Recently switched from At&t DSL to Uverse, and I'm no longer able to send email from one of my household's POP3 email accounts. After some Googling, I found what ought to be the fix; in mail client, change SMTP outgoing server to outbound.att.net, port 465 SSL checked, and then log in to At&t's webmail, add the email addresses I want to use in the accounts tab, verify the addresses, and it should then be possible to send email. This worked, for three out of four email addresses. The final address, the one I used to sign up for Uverse in the first place, cannot be verified. The verification email does not send, though I do get a "we have sent your verification email" popup.
This email address can receive other emails. It even received an email from the same address from which the verification email is sent, when it was the default "contact me" email, telling me that I'd just verified one of the other email addresses. I made this address no longer the default contact email in case that's why it wasn't working, but no matter what I do, I can't get the verfication email sent to it. It doesn't even end up in a spam folder. It's as though some part of the system recognizes it as already being verified in some fashion, but won't permit me to send mail from it because it still needs to go through one more hoop.
Is there some other way to get this email address verified for sending mail? I've just spent an hour talking to the support chatrobots, and they suggested I call a ConnectTech support person, which so far as I can tell would only be useful if I wanted to pay to unblock port 25, which I don't.