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Thunderbird stopped sending/receiving emails today from 3 of 20+ outlook.com accounts

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Hi, I have been using Thunderbird for about a year with 20 outlook.com accounts and a couple of others. Today it stopped being able to send and receive from 3 of the outlook.com accounts with the message 'Mail server responded: Logon failure: unknown user name or password.'

The username and password work fine in webmail and on my phone so the message can't be literally true. The other 17 outlook.com accounts work fine in Thunderbird so it can't be a server setting change at the outlook.com end nor any general issue in Thunderbird. I've removed and recreated the passwords in Thunderbird so it can't be corruption of the password table. I have Thunderbird on 2 computers, exactly the same setup, no problems until today, same issue on both machines today with the same 3 accounts, so it can't be any other corruption at the Thunderbird client end.

So now I'm stuck - the above seem to eliminate everything :-(.

Does anyone have any kind suggestions please?

Thanks and kind regards.

Hi, I have been using Thunderbird for about a year with 20 outlook.com accounts and a couple of others. Today it stopped being able to send and receive from 3 of the outlook.com accounts with the message 'Mail server responded: Logon failure: unknown user name or password.' The username and password work fine in webmail and on my phone so the message can't be literally true. The other 17 outlook.com accounts work fine in Thunderbird so it can't be a server setting change at the outlook.com end nor any general issue in Thunderbird. I've removed and recreated the passwords in Thunderbird so it can't be corruption of the password table. I have Thunderbird on 2 computers, exactly the same setup, no problems until today, same issue on both machines today with the same 3 accounts, so it can't be any other corruption at the Thunderbird client end. So now I'm stuck - the above seem to eliminate everything :-(. Does anyone have any kind suggestions please? Thanks and kind regards.

Saafara biñ tànn

What?! Thanks Nereus. I tried again this afternoon and 2 of the 3 of mine that didn't work magically did. Just tried again and the 3rd one magically works too.

I wonder what caused this 3-day 'outage'? All I can think of is maybe something on some of Microsoft's physical servers that just happened to have those accounts on them. Wierd.

Oh well, thanks for reading and sharing this episode folks :-)

Jàng tontu lii ci fi mu bokk 👍 0

All Replies (4)

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My problem is similar - my wife's outlook account works fine, but mine will not get incoming emails. Sending of outgoing emails works fine, so it can't be a username OR password problem. I've changed nothing, except for updating TBird to 78.6.1 today.

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Hi, I also tried removing and re-adding one of the accounts that stopped working. Thunderbird reported that it couldn't as the server wasn't found in that configuration and perhaps the email provider had changed the configuration. Yet 17 other accounts with the same outlook.com provider and same settings still work fine, as did the 3 that have stopped, until a few days ago.

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My problem has magically corrected itself! I have made no changes since my previous post, and today I started getting all the emails on TBird that I could not get yesterday. A mystery to me, as nothing has changed...

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Saafara yiñ Tànn

What?! Thanks Nereus. I tried again this afternoon and 2 of the 3 of mine that didn't work magically did. Just tried again and the 3rd one magically works too.

I wonder what caused this 3-day 'outage'? All I can think of is maybe something on some of Microsoft's physical servers that just happened to have those accounts on them. Wierd.

Oh well, thanks for reading and sharing this episode folks :-)