Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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.

Send Message Error

  • 3 replies
  • 0 have this problem
  • 1 view
  • Last reply by sfhowes

stephen_wilks
stephen_wilks
more options

I can receive E-Mails using thunderbird as a client but no send them. If I use the Microsoft web portal I can send and receive E-Mail messages.

When I send an email using any Microsoft E-Mail account I just receive the following message in a window. The Window is labeled as "Send Message Error". The message that I receive is;

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.

I have tried the following: Changing client account settings, update software, searched the knowledge base, deleted the accounts and recreated them, removed all thundebird software and reinstalling.

What has caused this and how can I get the client the work again.

I can receive E-Mails using thunderbird as a client but no send them. If I use the Microsoft web portal I can send and receive E-Mail messages. When I send an email using any Microsoft E-Mail account I just receive the following message in a window. The Window is labeled as "Send Message Error". The message that I receive is; 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. I have tried the following: Changing client account settings, update software, searched the knowledge base, deleted the accounts and recreated them, removed all thundebird software and reinstalling. What has caused this and how can I get the client the work again.

Chosen solution

Run Windows in safe mode and see if the problem remains.

Confirm that you have smtp.office365.com on 587, STARTTLS, normal password, User Name = email address.

Read this answer in context 👍 1

All Replies (3)

sfhowes
sfhowes
  • Top 10 Contributor
more options

Timeouts can be caused by antivirus apps scanning outgoing mail. Avast/AVG with the Mail Shield are known culprits. What's the AV and its mail settings?

stephen_wilks
stephen_wilks Question owner
more options

No. Its not the Antivirus. I just get this. Funny thing is other software that uses my E-Mail account do not work either.

sfhowes
sfhowes
  • Top 10 Contributor
more options

Chosen Solution

Run Windows in safe mode and see if the problem remains.

Confirm that you have smtp.office365.com on 587, STARTTLS, normal password, User Name = email address.