Deliverability 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.
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Sent vs Opens for sbcglobal.net

Date Sent Opens Open Rate
5/27/2023 6,247 294 0.0%
5/26/2023 11,078 1,006 0.0%
5/25/2023 11,371 1,249 0.0%
5/24/2023 13,130 1,323 0.0%
5/23/2023 16,036 1,996 0.0%
5/22/2023 12,578 1,442 0.0%
5/21/2023 4,349 428 0.0%
5/20/2023 3,883 380 0.0%
5/19/2023 9,833 1,717 0.0%
5/18/2023 12,541 2,163 0.0%
5/17/2023 10,590 1,282 0.0%
5/16/2023 12,583 1,488 0.0%
5/15/2023 10,860 1,270 0.0%
5/14/2023 5,405 779 0.0%
5/13/2023 7,610 731 0.0%
5/12/2023 11,629 1,217 0.0%
5/11/2023 10,723 1,490 0.0%
5/10/2023 13,173 1,381 0.0%
5/9/2023 11,252 1,441 0.0%
5/8/2023 12,638 2,008 0.0%
5/7/2023 4,548 495 0.0%
5/6/2023 5,387 603 0.0%
5/5/2023 10,304 1,339 0.0%
5/4/2023 12,828 1,514 0.0%
5/3/2023 10,925 1,601 0.0%
5/2/2023 8,949 1,515 0.0%
5/1/2023 11,486 1,376 0.0%
4/30/2023 4,971 657 0.0%
4/29/2023 8,434 895 0.0%
4/28/2023 11,518 1,423 0.0%

Blocks from sbcglobal.net

No blocks during specified time frame

Bounces from sbcglobal.net

Explanation of bounce codes

Message Count
550 5.2.1 ... Addressee unknown, relay= 3,582
550 5.2.1 ... blank mailhost - invalid address, relay= 456
SMTP; 554 30 Sorry, your message to cannot be delivered. This mailbox is disabled . 132
SMTP; 552 1 Requested mail action aborted, mailbox not found 53
SMTP; 550 5.2.1 ... Addressee unknown, relay= 12
421-4.7.28 Our system has detected an unusual rate of 421-4.7.28 unsolicited mail originating from your IP address. To protect our 421-4.7.28 users from spam, mail sent from your IP address has been temporarily 421-4.7.28 rate limited. Please visit 421-4.7.28 https://support.google.com/mail/?p=UnsolicitedRateLimitError 9
550 5.1.8 Access denied, bad outbound sender AS 8
550 - message rejected AUP#SNDR 6
SMTP; 554 Message permanently deferred due to unresolvable RFC.5321 from domain; see https://postmaster.yahooinc.com/error-codes 5
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. 4
550-5.2.1 The email account that you tried to reach is disabled. 2
550 5.1.10 Recipient not found by SMTP address lookup 2
550 5.4.1 Recipient address rejected: Access denied. AS 2
550 5.7.1 Connections not accepted from servers without a valid sender Fix reverse DNS for 209.85.210.169 1
554 5.2.2 mailbox full; Failed to process message due to a permanent exception with message Microsoft Unified Storage is full. Microsoft Unified Storage is full. 1
552 1 Requested mail action aborted, mailbox not found 1
550 5.4.6 Unusual sending activity detected. 1
DNS Error. DNS type 'mx' lookup responded with code NXDOMAIN 1
550 Requested action not taken: mailbox unavailable 1
The recipient server did not accept our requests to connect. 1

Methodology

Send and open statistics are updated daily. Bounces and blocks are updated in real-time. Every day, open statistics are updated for the last 14 days. Generally, you'll notice an increase of an open rate for a domain for a day over the course of 14 days, since not all open events occur the same day an email is sent. That means that open rate data is tied to the actual emails sent on a particular day.

Bounce and block codes are the codes as returned by the remote SMTP server after having been de-personalized. Meaning, unique identifiers present in SMTP codes are removed so that SMTP responses can be grouped for analysis. In certain cases, such as when the email is being relayed through an intermediary SMTP server, the remote SMTP server may not be the same as the MX record for the domain. SMTP codes are categorized as "bounces" vs "blocks" by internal human review. Bounces generally indicate an invalid email address. Blocks generally indicate a rejection of the email message but a valid email address.

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