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Trouble sending email via app - getting SMTP error messages

  • 8 replies
  • 1 has this problem
  • 40 views
  • Last reply by mark4jc

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I have an online AOL mail account via Verizon.net. When I try to send a new email via Thunderbird, I get an error message about my SMTP. Started happening around late 2020. I did not have to time to address the issue until now. I am able to receive my emails ok.

Incoming IMAP is entered as: IMAP.AOL.COM (works ok).

Original Outgoing STMP was entered as: SMTP.AOL.COM. But I also just today tried SMTP.VERIZON.NET (as documented in help notes) without any success.

I had version 78.2 to 78.14 (from Sept 2020 to Nov 2021) installed. Version 91.3 upgrade done Nov 2021 and now 91.3.2.

Tried disabling firewall without success.

I am using Windows 10 Pro (64), Windows firewall, Spectrum ISP,

Attached screenshots

All Replies (8)

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What are the settings? You should have smtp.aol.com on 465, SSL/TLS, OAuth2 authentication, User Name = email address. If you didn't have OAuth2 (and also for the incoming), change to that, remove passwords from Saved Passwords in Preferences, accept cookies in TB Preferences, restart TB, enter the account password in the OAuth window.

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I changed back to: smtp.aol.com on 465, SSL/TLS, OAuth2 authentication[new], User Name = email address. Also removed passwords and accepted cookies in TB Preferences. Restart required a reentered password. Sending a new email resulted in the following error message.

Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) SMTP.AOL.COM failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again

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and are cookies enabled in Thunderbird? They are required for oAuth.

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Yes, cookies enabled. Changed to oAuth2 (first time this had been done since using TB).

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According to AOL, Verizon accounts should use smtp.verizon.net. But that will now work only with 'normal password' authentication and an app password. I suppose you could have the incoming imap.aol.com use OAuth2, but it's probably easier to use 'normal password' and the same app password as the one for smtp.

TB supports OAuth2 for the *.aol.com servers, but I don't think OAuth2 for the *.verizon.net servers is explicitly built into TB, even if the Verizon servers do support OAuth2, which would be expected since they are based on AOL (which is based on Yahoo).

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Thanks for getting back with Verizon info. I saw on AOLs help search a solution to remove the account and add as a new account. TB chose a POP3 account under autoconfiguration per its data base. I manually changed it to IMAP using the above smtp and imap entries. It look like it worked! TB downloaded my AOL inbox and folders.

I tried SENDING a test message. It finally worked. It was never an incoming issue.

UPDATE: When I sent a test message with an additional "Reply-to" address, i got the smtp error message. SO it looks like it is the "reply-to" function that is causing problems. A Mozilla help search says that this is a provider problem.

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Just for the record, can you list the server names you used with the @verizon.net address, and the authentication method(s), e.g. imap.aol.com with OAuth2 or app password, smtp.verizon.net with app password?

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I'm accessing AOL Mail on my Chrome browser. I am using Spectrum as my ISP.

The imap used normal password. The smtp.verizon.net used normal password. Both used SSL/TLS security.

I also changed smtp to smtp.aol.com with OAuth2. Used SSL/TLS. This also worked!

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