We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

Unable to send message

more options

Good afternoon everyone,

I am having a problem with thunderbird, hopefully someone will come up with a fix.

After updating thunderbird last week, I can't send e-mail. Only comunicate I have is "unable to send a message". Nothing with SMTP server etc...

What I tried: -reinstall of thunderbird -downgrade to lower versions (even before 78) -disabling firewall and antivirus -tried on outlook and mailbird, on both clients everything works fine. Problem persists only on thunderbird

I need thunderbird to work, since few of my must have applications are set to work with it and won't work with other clients. All the setting are correct, I doublechecked and also configured to other mailing clients. All fine on those. Not at problem with hosting since I have 4 more computers using the same domain, setting etc and also updated version of thunderbird. Everything works fine over there.

Any ideas ?

Good afternoon everyone, I am having a problem with thunderbird, hopefully someone will come up with a fix. After updating thunderbird last week, I can't send e-mail. Only comunicate I have is "unable to send a message". Nothing with SMTP server etc... What I tried: -reinstall of thunderbird -downgrade to lower versions (even before 78) -disabling firewall and antivirus -tried on outlook and mailbird, on both clients everything works fine. Problem persists only on thunderbird I need thunderbird to work, since few of my must have applications are set to work with it and won't work with other clients. All the setting are correct, I doublechecked and also configured to other mailing clients. All fine on those. Not at problem with hosting since I have 4 more computers using the same domain, setting etc and also updated version of thunderbird. Everything works fine over there. Any ideas ?

All Replies (10)

more options

I have the same problem. I can sometimes send the email if I add a bcc to myself. Or if that doesn't work, write an email to myself and try sending it, then try sending the email I really want to send. There is no rhyme or reason to what I am doing, but eventually I am able to send the email.

This is not a solution to the problem, but something to try until they fix the problem.

more options

Hey,

So I fixed my issue.

I tried everything but in the end what fixed it was to go to AppData\Local\Temp and then delete the messages stuck there. Not sure why this helped because I still had free space on drive but it fixed it for me.

more options
more options

bartosz.rogalski.pilica said

Hey, So I fixed my issue. I tried everything but in the end what fixed it was to go to AppData\Local\Temp and then delete the messages stuck there. Not sure why this helped because I still had free space on drive but it fixed it for me.

That is very strange. Did you take any screen shots or have a sense of how many files where there?

more options

I did not take screenshots but over 500

more options

I have over 100 files there. Are there specific file types that you deleted? I received a warning about deleting a file that was shared.

more options

JohnnyBeau said

I have over 100 files there. Are there specific file types that you deleted? I received a warning about deleting a file that was shared.

For me the e-mails had thunderbird icon because those were like draft messages stuck there. As far as I remember they had .eml extenson

more options

bartosz.rogalski.pilica said

JohnnyBeau said

I have over 100 files there. Are there specific file types that you deleted? I received a warning about deleting a file that was shared.

For me the e-mails had thunderbird icon because those were like draft messages stuck there. As far as I remember they had .eml extenson

I can't find any files like that in AppData. Thanks for getting back to me quickly.

more options

Make sure you go to Appdata/Locac/Temp because this is where they were in my case.

Or just open explorer and use %temp% it will get you over there directly

more options

bartosz.rogalski.pilica said

Make sure you go to Appdata/Locac/Temp because this is where they were in my case. Or just open explorer and use %temp% it will get you over there directly

I went to

C:\Users\...\AppData\Local\Temp

but I could not find any Thunderbird icons or .eml extensions.

Does anyone else have any success? The time wasn't wasted because I learned a few things in the process. Thank you again