Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Sykje yn Support

Mij stipescams. Wy sille jo nea freegje in telefoannûmer te beljen, der in sms nei ta te stjoeren of persoanlike gegevens te dielen. Meld fertochte aktiviteit mei de opsje ‘Misbrûk melde’.

Learn More

Dizze konversaasje is argivearre. Stel in nije fraach as jo help nedich hawwe.

Thunderbird Cannot Send Email Through Outlook Account

  • 4 antwurd
  • 0 hawwe dit probleem
  • 43 werjeftes
  • Lêste antwurd fan tjcorcoran

more options

I installed Thunderbird 115.0.1 on Windows 11. I configured it for two accounts. One was a custom domain managed by Google, the second an Outlook account with my Office365 subscription.

Both receive mail fine. Neither would send mail. Investigating further I found that Thunderbird never got a firewall exception. I added the exception and now the Google account sends and receives fine. Outlook will still not send.

I've removed and re-added the Outlook account a couple of times now. No joy. I have found a lot of conflicting information on SMTP server settings but currently have the queried (auto configured) smtp.office365.com server on port 587 with my account credentials for login, connection security of 'STARTTLS' and authentication method of 'normal password'.

I've tried a couple of other email clients and they work out of the box. Any help would be appreciated.

-T

I installed Thunderbird 115.0.1 on Windows 11. I configured it for two accounts. One was a custom domain managed by Google, the second an Outlook account with my Office365 subscription. Both receive mail fine. Neither would send mail. Investigating further I found that Thunderbird never got a firewall exception. I added the exception and now the Google account sends and receives fine. Outlook will still not send. I've removed and re-added the Outlook account a couple of times now. No joy. I have found a lot of conflicting information on SMTP server settings but currently have the queried (auto configured) smtp.office365.com server on port 587 with my account credentials for login, connection security of 'STARTTLS' and authentication method of 'normal password'. I've tried a couple of other email clients and they work out of the box. Any help would be appreciated. -T

Keazen oplossing

The outgoing server is smtp.office365.com, 587, STARTTLS, OAuth2 authentication, User Name = email address.

https://support.mozilla.org/en-US/questions/1417298#answer-1588949

Dit antwurd yn kontekst lêze 👍 0

Alle antwurden (4)

more options

My smtp server is outlook.office365.com

more options

Tried that. Still doesn't work. I practiced my google-fu and found Microsoft's published settings:

SMTP Server Server Name: smtp-mail.outlook.com Port: 587 Connection Security: STARTTLS

It also says no encrypted authentication required, so I left it (after trying all of them) on 'Normal Password'.

I finally find a client I like and now this! ;P

-T

more options

Keazen oplossing

The outgoing server is smtp.office365.com, 587, STARTTLS, OAuth2 authentication, User Name = email address.

https://support.mozilla.org/en-US/questions/1417298#answer-1588949

more options

Success! Combination was off. Thank you @sfhowes