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

This thread was archived. Please ask a new question if you need help.

Thunderbird not sending emails.

  • 1 reply
  • 1 has this problem
  • 5 views
  • Last reply by sfhowes

michael.m.meyer
michael.m.meyer
more options

I'm currently on version 91.3.1 of Thunderbird and for over a month I have not been able to send emails. I have had several updates to Thunderbird since the problem began but the problem has persisted. My Outgoing Server (SMTP) settings are:

Description: Microsoft Live Hotmail Server Name: smtp.office365.com Port: 587 User Name: "My correct Outlook email address" Authentication Method: Normal password Connection Security: STARTTLS

Can anyone help me resolve this issue?

I'm currently on version 91.3.1 of Thunderbird and for over a month I have not been able to send emails. I have had several updates to Thunderbird since the problem began but the problem has persisted. My Outgoing Server (SMTP) settings are: Description: Microsoft Live Hotmail Server Name: smtp.office365.com Port: 587 User Name: "My correct Outlook email address" Authentication Method: Normal password Connection Security: STARTTLS Can anyone help me resolve this issue?

All Replies (1)

sfhowes
sfhowes
  • Top 10 Contributor
more options

The settings are correct, and my Hotmail account sends with no problems. What is the antivirus and its settings for email? Are you using a VPN? Two-step verification on the account?