I migrated my Verizon email address to AOL. I have two phones: a Samsung Galaxy and an iPhone. Both are configured to access my email using POP3. Both can send & receive email when connected to WiFi at my home. My ISP is Verizon. But, when I try to connect via 4G LTE cellular data, both fail. Can neither send nor receive email. My cellular provider is AT&T.
The Android phone doesn't present any error messages. When trying to get email the iPhone says "The mail server pop.verizon.net is not responding". When trying to send it says "Cannot connect to smtp.verizon.net".
It's not a login ID, password, port #, or other configuration problem because both phones work when using WiFi.
I tried sending email using my gmail.com and yahoo.com email accounts to my verizon.net account. That worked on both phones. Outbound mail to those accounts fails like mail to any other account.
I think it's related to the fact that I'm using an AT&T cellular connection to access an AOL email server that's servicing Verizon domain names (verizon.net). I had to pay to talk to an AOL Technical Support person. Spent 3+ hours on the phone with them and they are stumped.
Any help from the community would be most appreciated.