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.

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

Thunderbird not sending e-mails to my outlook.com but receiving email from Outlook IMAP works fine

more options

To try and rectify thunderbird not sending email to my outlook.com I have deleted the acount in thunderbird twice and reset it up each time. The problem is the IMPAP e-mail download works fine but sending e-mail either stays stuck on sending, times out or I get not authenticated on SMTP server. My send set up is :- Port 587 Server name: smtp.office365.com Connection Security: STARTTLS Authentication Method: OAuth2 User name: This is my outlook e-mail address ie name@outook.com I confirmed the message originating from Outlook asking to confirm access by Thunderbird. My Thunderbird is up to date with latest version. Any Ideas? Thanks! By the way, Thunderbird works fine with my GMail account for both IMAP and Sending mail - I deleted my gmail account in Thunderbird and re-istalled it - all reinstalled work fine but not so with sending e-mails to my outlook account.

Thanks Much.

To try and rectify thunderbird not sending email to my outlook.com I have deleted the acount in thunderbird twice and reset it up each time. The problem is the IMPAP e-mail download works fine but sending e-mail either stays stuck on sending, times out or I get not authenticated on SMTP server. My send set up is :- Port 587 Server name: smtp.office365.com Connection Security: STARTTLS Authentication Method: OAuth2 User name: This is my outlook e-mail address ie name@outook.com I confirmed the message originating from Outlook asking to confirm access by Thunderbird. My Thunderbird is up to date with latest version. Any Ideas? Thanks! By the way, Thunderbird works fine with my GMail account for both IMAP and Sending mail - I deleted my gmail account in Thunderbird and re-istalled it - all reinstalled work fine but not so with sending e-mails to my outlook account. Thanks Much.

Isisombululo esikhethiwe

I fixed this my going to my actual Microsoft Outlook Acount and under alias names I had the primary name as my google e-mail name and changed this to my Outlook e-mail address. Alos, I went into Thunderbird Outlook account and made sure my name box contained the same name as my outlook e-mail address, as it had other outlook address consisting of my name, a long set of numbers, followed by outlook.com. Very tricky Indeed to work and try this out - took me ages.

Funda le mpendulo ngokuhambisana nalesi sihloko 👍 0

All Replies (4)

more options

The error message I get on sending to outlook:

"Login to server smtp.office365.com with username 'my name'@outlook.com failed"

Helpful?

more options

check in outgoing server(smtp) in account settings. My guess is you have more than one outlook SMTP entry and it is using one set for something other than oauth authentication.

Helpful?

more options

Hi Matt, Thanks for your reply and consideration - appreciated. Within Thunderbird when on my outlook account under the 'outgoing server', it highlights and says "smtp.office365.com". When I go into edit of this , it does list my google account outgoing server "smtp.gmail.com", but that is not highlighted - the google account outgoing server is only highlighted as active when I am in my gmail account in Thunderbird.

If Thunderbird when I am in my outlook account, is somehow using my google outgoing server in error, there is nothing to show this is happening and can only conclude some sort of bug in Thunderbird i.f that is the case. Afraid am still at a loss if anyone has other thoughts -Thanks Much

Helpful?

more options

Isisombululo Esikhethiwe

I fixed this my going to my actual Microsoft Outlook Acount and under alias names I had the primary name as my google e-mail name and changed this to my Outlook e-mail address. Alos, I went into Thunderbird Outlook account and made sure my name box contained the same name as my outlook e-mail address, as it had other outlook address consisting of my name, a long set of numbers, followed by outlook.com. Very tricky Indeed to work and try this out - took me ages.

Helpful?

Buza umbuzo

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