Thunderbird Support Forum

All of a sudden, since yesterday, I cannot send any emails via TB since I upgraded to the 115-version. I've never experienced this before using TB.

Sending emails elsewhere from - by directly logging in to hotmail or from my phone - is no problem whatsoever.

But on TB115, when attempting to send a mail, an empty pop-up window appears with the headline "Enter credentials for (my emailaddress) on smtp.office365.com", before closing again. After a short while attempting to deliver the message, an error box reads: "Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.office365.com timed out. Try again."

SMTP settings: Outlook.com (Microsoft) smtp.office365.com Port 587 STARTTLS OAuth2

Any solutions?

I've changed my ISP's mail server password, and it's correct in Saved Logins, but I can't send mail because I need to change the SMTP password. My SMTP account is listed correctly, but it doesn't appear in the Saved Logins list. So I can't update its password. How can I get my SMTP account added to the Saved Logins list?

Thanks in advance for your work on this.

I have multiple Gmail and Earthlink email address and use Thunderbird 102.6.1 to manage them. Emails are disappearing from the inboxes of individual email addresses and put into another single one. Emails sent out from one address are being labeled as from that common address. When someone replies to such an email, it is addressed to this common address. Any explanation?

I have an account with Network Solutions that I've been using for about 20 years with minimal issues. I download messages to Thunderbird via POP and send messages via SMTP. NS just upgraded their email system. The POP3, IMAP and SMTP servers are all new, with new names. I updated to the server settings in Thunderbird and POP still works fine, but I get the attached error when attempting to send a message via SMTP. I just now upgraded TB to 102.3.3 and still get the send error. The strange thing is that using those exact same server config settings on my iPhone and iPad, I can send and receive with no issues. Is there a log file somewhere in Thunderbird that would provide any more information about this error? Anyone have any ideas what the problem might be? Thank you