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Deliverability to yahoo.com

Sending volume, opens, bounce responses, and block messages observed by GMass for email sent to yahoo.com.

Yahoo! is today’s second most popular email service but was once the leader of the pack and even offered to purchase Google at one time. Yahoo! is not only a household search and communications moniker, but the name is also a little-known backronym which stands for 'Yet Another Hierarchical Officious Oracle'. After a string of acquisitions of its own, Yahoo! is now under the Verizon Communications umbrella.
Emails sent 449,985,370 Messages represented in this domain dataset
Unique opens 48,009,922 Unique open events associated with those sends
Open rate 10.7% Across all available data for yahoo.com
Explore other domains naver.com 163.com yahoo.dk yahoo.fr hotmail.de

Sent vs. opens

Change the date range or chart style. Bounce and block sections below follow the same selected date range.

Date Sent Opens Open rate

Blocks from yahoo.com

SMTP responses that generally indicate a valid address whose message was rejected.

No blocks during the specified time frame.

Bounces from yahoo.com

SMTP responses that generally indicate an invalid or undeliverable email address.

Bounce code guide
74,468 bounce events · 122 response types
  • 552 1 Requested mail action aborted, mailbox not found 45,452
  • 554 30 Sorry, your message to cannot be delivered. This mailbox is disabled . 23,513
  • 552 5.2.2 This message could not be delivered because the recipient's mailbox is full. Please try again later or contact the recipient directly. See https://senders.yahooinc.com/smtp-error-codes#mailbox-full 4,332
  • 454 4.7.1 : Relay access denied 408
  • 550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient's email address for typos or 550-5.1.1 unnecessary spaces. For more information, go to 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser 201
  • aggressive-handler 88
  • SMTP; 552 1 Requested mail action aborted, mailbox not found 36
  • 550 5.7.25 Forward-confirmed reverse DNS failed tnmpmscs 36
  • SMTP; 554 30 Sorry, your message to cannot be delivered. This mailbox is disabled . 14
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.177 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 13
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.169 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 12
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.174 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 11
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.44 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 11
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.179 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 10
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.182 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 10
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.175 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 10
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.181 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 10
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.173 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 10
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.170 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 9
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.171 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 9
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.172 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 9
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.53 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 7
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.178 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 7
  • 550 5.5.0 Requested action not taken: mailbox unavailable . 7
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.54 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 6
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.180 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 6
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.44 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 6
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.46 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 6
  • 550 5.4.300 Message expired -> 451 This mail has been deferred because the sender is sending too much mail for its authentication status. Please set up DKIM aligned to the From: domain. See https://senders.yahooinc.com/smtp-error-codes#authentication-failures 6
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.53 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 6
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.42 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 6
  • 550-5.7.40 Your email has been blocked because the From: header in 550-5.7.40 this message isn't aligned with either the authenticated SPF or DKIM 550-5.7.40 organizational domain. To learn more about DMARC alignment, visit 550-5.7.40 https://support.google.com/a?p=dmarc-alignment 6
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.46 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 5
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.49 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 5
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.45 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 5
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.160.48 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 5
  • Message rejected. For more information, go to https://support.google.com/mail/answer/69585 5
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.52 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 4
  • The recipient server did not accept our requests to connect. For more information, go to https://support.google.com/mail/answer/7720 4
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.47 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 4
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.51 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 4
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.48 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 4
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.50 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 4
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.167.176 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 4
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.49 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 4
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.160.43 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 4
  • The email account that you tried to reach does not exist. Please try double-checking the recipient's email address for typos or unnecessary spaces. For more information, go to https://support.google.com/mail/?p=NoSuchUser 4
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.52 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 4
  • 550 5.7.520 Access denied, Your organization does not allow external forwarding. Please contact your administrator for further assistance. AS 3
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.45 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 3
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.42 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 3
  • 552 40 Requested mail action aborted 3
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.160.52 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 3
  • 550 5.1.1 Recipient does not exist here. 3
  • DNS Error. DNS type 'mx' lookup responded with code NXDOMAIN 3
  • 550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors 3
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.218.42 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 3
  • SMTP; 552 5.2.2 This message could not be delivered because the recipient's mailbox is full. Please try again later or contact the recipient directly. See https://senders.yahooinc.com/smtp-error-codes#mailbox-full 3
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.160.45 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 3
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.160.53 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 3
  • 550 permanent failure for one or more recipients 3
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.54 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550 5.5.1 Recipient rejected - - https://postmaster-earthlink.vadesecure.com/inbound_error_codes/#_403 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.208.41 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550-5.7.1 Gmail has detected that this message is likely 550-5.7.1 unsolicited mail. To reduce the amount of spam sent to Gmail, this 550-5.7.1 message has been blocked. For more information, go to 550 5.7.1 https://support.google.com/mail/?p=UnsolicitedMessageError 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.43 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.160.46 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.208.45 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.160.54 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.43 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 554 Reject by behaviour spamANTISPAM_BAT: too frequently sending 2
  • 550 5.1.1 Not our Customer 2
  • 550-5.7.30 Your email has been blocked because DKIM authentication didn't pass 550-5.7.30 for this message. Gmail requires all email bulk senders to 550-5.7.30 authenticate their email with DKIM. 550-5.7.30 550-5.7.30 Authentication results: 550-5.7.30 DKIM = did not pass 550-5.7.30 To set up DKIM for your sending domains, visit 550-5.7.30 https://support.google.com/a?p=turn-on-dkim 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.160.41 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.214.182 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550 5.1.1 recipient rejected 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.172 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 554 5.7.1 : Recipient address rejected: user does not exist 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.218.43 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • NoMxRecord:0-0 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.47 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.51 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.218.54 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.160.51 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.218.50 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • This email has been blocked due to PMF Policies. 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.160.50 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 2
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.41 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 552-5.2.2 The recipient's inbox is out of storage space and inactive. Please 552-5.2.2 direct the recipient to 552 5.2.2 https://support.google.com/mail/?p=OverQuotaPerm 1
  • 550 RCPT TO: User unknown 1
  • 550-5.2.1 The email account that you tried to reach is inactive. For more 550-5.2.1 information, go to 550 5.2.1 https://support.google.com/mail/?p=DisabledUser 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.218.44 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.222.181 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 452-4.2.2 The recipient's inbox is out of storage space. Please direct the 452-4.2.2 recipient to 452 4.2.2 https://support.google.com/mail/?p=OverQuotaTemp 1
  • X-Postfix; Host or domain name not found. Name service error for name=cocoamarketinguk.com type=A: Host not found 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.215.180 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 5.1.1 : Recipient address rejected: User unknown in relay recipient table 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.208.44 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.41 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 451 4.4.4 Mail received as unauthenticated, incoming to a recipient domain configured in a hosted tenant which has no mail-enabled subscriptions. ATTR5 : retry timeout exceeded 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.160.47 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.208.51 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table 1
  • 450 Message not queued: recipient is suppressed 1
  • 554 Message permanently deferred due to unresolvable RFC.5321 from domain. See https://senders.yahooinc.com/error-codes#unresolvable-from-domain 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.210.50 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.208.47 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 5.1.10 Recipient not found by SMTP address lookup 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.218.52 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 No Such User Here 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.215.175 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 is not a valid user 1
  • 550 5.0.350 Remote server returned an error -> 552 1 Requested mail action aborted, mailbox not found 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.218.53 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 552 3 Requested mail action aborted, mailbox not found 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.208.42 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 551 SenderAuthorization: is not authorized to send emails to this service. 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.216.41 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.161.48 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF datamatrixbd.com with ip 209.85.210.68 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF prabhavathitechnologysolutions.com with ip 209.85.216.47 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1
  • 550 5.7.9 This mail has been blocked because the sender is unauthenticated. Yahoo requires this sender to authenticate with DKIM. SPF alone is not sufficient. Authentication results: DKIM = FAILURE - SPF timesinternational.biz with ip 209.85.218.49 = SUCCESS. See https://senders.yahooinc.com/smtp-error-codes/#authentication-failures 1

Methodology

Send and open statistics

Send and open statistics are updated daily. Every day, open statistics are refreshed for the previous 14 days because not every open happens on the same day an email is sent. Open-rate data remains tied to the emails actually sent on each particular day.

Bounces and blocks

Bounces and blocks update in real time. SMTP responses are de-personalized so similar responses can be grouped for analysis. GMass categorizes responses through internal human review: bounces generally indicate an invalid address, while blocks generally indicate a valid address whose message was rejected.

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