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Deliverability to sbcglobal.net

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

Originating from the once widely used telephone service provider, Southwestern Bell, SBCGlobal.net has seen its own share of change. Now an AT&T affiliate, and most recently, part of Yahoo! SBCGlobal.net users may access their email via AT&T Yahoo! at ATT.net.
Emails sent 18,223,700 Messages represented in this domain dataset
Unique opens 2,274,451 Unique open events associated with those sends
Open rate 12.5% Across all available data for sbcglobal.net

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 sbcglobal.net

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

No blocks during the specified time frame.

Bounces from sbcglobal.net

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

Bounce code guide
4,185 bounce events · 9 response types
  • 554 30 Sorry, your message to cannot be delivered. This mailbox is disabled . 2,908
  • 552 1 Requested mail action aborted, mailbox not found 1,237
  • 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 25
  • 550 5.7.25 Forward-confirmed reverse DNS failed tnmpmscs 10
  • aggressive-handler 1
  • NoMxRecord:0-0 1
  • 551 SenderAuthorization: is not authorized to send emails to this service. 1
  • 552 3 Requested mail action aborted, mailbox not found 1
  • 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 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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