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SMTP thru outlook office 365 - DON'T WORK

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Hi there,

So, I have a professional account with outlook.office365.com for my professional email (which is aleclercq@sobemab.fr). But I use my personal email to contact you right now. We have Black in Mail operating for all new email and then I can't get email from you unless you authenticate yourself.

Anyway, my configuration is : HP computer, windows 11 Professional (build 22631.4112) Thunderbird version 128.2.0esr (64-bit). Add-on Owl for exchange.

Now, when I launch Thunderbird, it connect properly and I do receive emails. All good.

But the problem comes when I want to SEND an email. It doesn' t work. I have attached some screenshots for you to see. It will be easier that way, I guess. I'll appreciate your help on that matter ASAP. Outlook is ok, but I can't stand it and I really want to use Thunderbird. :)

Thank you Best Regards Alexandre

Hi there, So, I have a professional account with outlook.office365.com for my professional email (which is aleclercq@sobemab.fr). But I use my personal email to contact you right now. We have Black in Mail operating for all new email and then I can't get email from you unless you authenticate yourself. Anyway, my configuration is : HP computer, windows 11 Professional (build 22631.4112) Thunderbird version 128.2.0esr (64-bit). Add-on Owl for exchange. Now, when I launch Thunderbird, it connect properly and I do receive emails. All good. But the problem comes when I want to SEND an email. It doesn' t work. I have attached some screenshots for you to see. It will be easier that way, I guess. I'll appreciate your help on that matter ASAP. Outlook is ok, but I can't stand it and I really want to use Thunderbird. :) Thank you Best Regards Alexandre
Attached screenshots

All Replies (6)

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change server name to smtp.office365.com

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Hi David

Nope, still doesn't work.

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It really annoying !! here a new screenshot

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Did you try closing and restarting thunderbird? It may not matter, but the setting you have for SMTP is correct

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I did it. I also removed the account and created it again after restarting Thunderbird. Still not working. I also posted a note on Microsoft Tech Community.

And I am gonna to ask my IT dept. to activate (eventually) it on the Office365 admin dashboard. I try everything possible. :)

But I think the problem come from Microsoft. Because everything else works perfectly (calendar, contacts) all synchronized properly.

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Hi

I found the solution. It appear that on the Microsoft dashboard, the admin must enable "authentication SMTP". It's lost on the middle of Microsoft configuration dashboard for a company set up. Basically, there is a web page where the admin has to enable the following : - Outlook on the web - Outlook Desk version (MAPI) - Exchange web services - Mobile (Exchange ActiveSync) - IMAP - POP - Authenticated SMTP

Then it works. Thank you all for your help. Have a great day.

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