Форум сообщества Thunderbird

Good day! Could you help me please. There is a trouble with delivering e-mails to our clients, they do not receive our letters because the system returns them back. We cannot understand the reasons. The thing is that it does not happen with each letter. It works in a spontaneous way, some letter can be sent without any problem, another one will be returned.

That is what we get from the system:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

 sergeevvrob@mail.ru
   host mxs.mail.ru [217.69.139.150]
   SMTP error from remote mail server after end of data:
   550 Message was not accepted -- invalid mailbox.  Local mailbox sergeevvrob@mail.ru is unavailable:
   user not found

Reporting-MTA: dns; cpanel9.c.fozzy.com

Action: failed Final-Recipient: rfc822;sergeevvrob@mail.ru Status: 5.0.0 Remote-MTA: dns; mxs.mail.ru Diagnostic-Code: smtp; 550 Message was not accepted -- invalid mailbox. Local mailbox sergeevvrob@mail.ru is unavailable: user not found

Microsoft sent me this: Various non-Microsoft applications will have their own steps for connecting to your Outlook.com email account using modern authentication methods. See our help article - Modern Authentication Methods now needed to continue syncing Outlook Email in non-Microsoft email apps. However, you may need to contact the creators of those applications to provide you with instructions. In many cases, simply removing and re-adding your account with the latest version of that application will configure it to use modern authentication methods.

Will Thunderbird continue to link me to Outlook? If so, how?

Thank you.

Hello, I'm new to this Thunderbird I'm using a desktop computer with Win 10 and Office 2016. I have been having issues with outlook 2016, it keep asking for my credentials and I can't seem to be able to find any solutions so a friend recommended Thunderbird to me. I'm trying it and so far my emails are synchronized but not my calendar nor my address book. I cant seem to find where Thunderbird can sync with those two. I do not want to import into the app but sync like my iPhone is doing so if I enter an event in any of them it will show up in the other one. Pretty simple but I can not find this in the Thunderbird desktop app.

please help Kind regards Richard

The latest rev is VERY slow (several seconds) compared to prior revs to process email changes within INBOX (OPEN, MOVE, DELETE, etc.)

Something new is going on internally to the program while the hour-glass appears for a few seconds more than before (I did not change any settings w/ latest upgrades).

my head is spinning with trying to understand. i changed the authentication to oauth2 but can't seem to find out whats wrong and my dislexia is making it so hard to figure out.

Already a voluntary donor and satisfied Thunderbird user then I suddenly lost many of my folders and could not recover them, asked for support but got none; nobody interested! As a non-techy older person I expect help when necessary so this has been a sobering event, making me question my continued presence here; very disappointed. John

Thunderbird for Mac won't allow me to set up Gmail. I'm using the latest version (128.4.3esr) of Thunderbird on Mac OS Sonoma 14.6.1.

It gets stuck on "Checking Password"

I've gone through all the standard checks - The password is correct, IMAP Access in verified in Gmail, Accept Cookies is on in Thunderbird settings, incoming and outgoing server details are correct. Firewall and anti-virus are off etc.

I really want to stop using MS Outlook for Mac, but need a reliable Email client. Am hoping this is Thunderbird....

Anyone know a fix for this? Thanks

Hi I started my Thunderbird on my laptop today 2024-11-26. However, last emails are from 2024-11-19, i.e 7 days ago.

I don't see what's wrong. No filters, strange sorting or similar are applied. When I login to same mailadress via webmail instead, everything works. There I have many mails between 19th Nov until today 26th Nov.

Any ideas what can be wrong? /Best Regards Joakim