Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Este fío arquivouse. Faga unha nova pregunta se precisa axuda.

Can receive emails in TB but can not send

  • 1 resposta
  • 0 have this problem
  • 2 views
  • Last reply by christ1

Paul Harbottle
Paul Harbottle
more options

We have two IMAP email accounts which use smtp.outlook365.com to send emails via Thunderbird 115.7.0 One account stopped being able to send about six months ago but I could not resolve the problem with either your help pages or by comparing with account settings with the address which could send emails successfully. This week the second account can not send emails either. Both accounts receive all incoming emails. We have Kaspersky VPN and have switched this off without it making any difference.

Our smtp settings are:- smtp.office365.com port 587 STARTTLS Normal password (I have tried OAuth2 and No authentication but none helped) user.name@outlook.com

The error message on sending says :- 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.

Any help would be appreciated.

We have two IMAP email accounts which use smtp.outlook365.com to send emails via Thunderbird 115.7.0 One account stopped being able to send about six months ago but I could not resolve the problem with either your help pages or by comparing with account settings with the address which could send emails successfully. This week the second account can not send emails either. Both accounts receive all incoming emails. We have Kaspersky VPN and have switched this off without it making any difference. Our smtp settings are:- smtp.office365.com port 587 STARTTLS Normal password (I have tried OAuth2 and No authentication but none helped) ''user.name''@outlook.com The error message on sending says :- 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. Any help would be appreciated.

All Replies (1)

christ1
christ1
  • Top 25 Contributor
more options

https://support.mozilla.org/kb/microsoft-oauth-authentication-and-thunderbird-202