“Unable to send the message. Please verify the e-mail address in your account properties"
From: AT&T Powered by Yahoo! [mailto:firstname.lastname@example.org]
Sent: 28 November, 2015 1:53 PM
Subject: Important: Verification Required - Action Needed
Dear AT&T Internet Services Member,
We have received questions regarding the following error message which is received by customers when they send e-mail using a non-verified e-mail address:
“Unable to send the message. Please verify the e-mail address in your account properties. The server responded: 553 From: address not verified.”
If you have received this error message, you will continue to receive it for emails sent with a non-verified address until you verify your Yahoo! email address or any other non AT&T email addresses (e.g., email@example.com, firstname.lastname@example.org, email@example.com, etc.). Verification instructions are available on the AT&T Help site https://www.att.com/esupport/article.jsp?sid=KB412255. If you have already verified your non AT&T email address and are no longer receiving the 553 error message, please disregard this email.
Thank you for your attention to this matter as we work to improve your Internet service. Our goal continues to be to make you a very satisfied customer. If you are experiencing any issues and would like to speak to a customer support representative, please contact us at 1-877-722-3755.
Sincerely, AT&T Internet Services
Yahoo! is a registered trademark of Yahoo! Inc. © 2008 AT&T Intellectual Property. All Rights Reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property. Please do not reply to this message via e-mail. This address is automated, unattended, and cannot help with questions or requests.
Apparently this (bogus?) email error message has been around for years and nobody yet seems to know why it's generated and how to get rid of it. I just got off the phone with a U-verse "problem resolution specialist" who told me it was non-AT&T "spam" from "somewhere" and to just ignore it. That's easier said than done since it comes in multiple times a day and tends to run a person crazy. I've combed the archives and fiddled-around with settings in both the AT&T Webmail account and on Outlook 2016 and they all are configured to the exact recommended settings. There's no obvious way to "verify" anything that I've found so far. Also, when you click the https://www.att.com/esupport/article.jsp?sid=KB412255 link it just goes to a dead page with the most unhelpful message possible, that being:
Page Not Found The article you're looking for doesn't live here anymore.
We work to keep our site updated with the most current information,
so sometimes we have to retire an article.
I've seen references to this dating back to the early 2000s so surely somebody, somewhere (preferably AT&T since it's their deal) has come up with a solution to fix this huge spam problem once & for all. Thanks and standing by for a truly Final Solution...