We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

Can't Sent Emails with my Microsoft Account

  • 2 svar
  • 0 har dette problemet
  • Siste svar av Dewi

Dewi
Dewi
more options

As of a month or so ago, I've been unable to send emails with my Microsoft account and have to click retry a bunch to get it to fetch my emails on startup.

I found this article and swapped the security for server settings and outgoing servers to SSS/TLS and the authentification method to 0Auth2 but now rather than asking for a password when I send an email, it's taking forever then failing, asking me to check my outbound settings. "Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again."

As of a month or so ago, I've been unable to send emails with my Microsoft account and have to click retry a bunch to get it to fetch my emails on startup. I found [[Microsoft OAuth Authentication and Thunderbird in 2024|this]] article and swapped the security for server settings and outgoing servers to SSS/TLS and the authentification method to 0Auth2 but now rather than asking for a password when I send an email, it's taking forever then failing, asking me to check my outbound settings. ''"Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again."''
Attached screenshots

Valgt løsning

The correct settings are: smtp.office365.com, 587, STARTTLS, OAuth2, email address. Still failing after restarting TB?

Les dette svaret i sammenhengen 👍 0

All Replies (2)

sfhowes
sfhowes
  • Top 10 Contributor
more options

Valgt løsning

The correct settings are: smtp.office365.com, 587, STARTTLS, OAuth2, email address. Still failing after restarting TB?

Helpful?

Dewi
Dewi Eieren av spørsmålet
more options

Apologies for the late reply. Changing the settings to those you listed worked great, thanks!

Helpful?

Still et spørsmål

You must log in to your account to reply to posts. Please start a new question, if you do not have an account yet.