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 is just hanging today - no changes made by me since yesterday. Any ideas?

more options

Thunderbird is just hanging today. No changes made to anything on PC since it was OK yesterday. Checked online email account and it's fine. TB opens, lets me read an email and reply to it but then it says it's sending to Sent folder but nothing happens and window locks up. Can't close the program apart from through Task Manager. Can't access any menus from top tabs as a very narrow grey box with no options on it pops up when clicked on. Anyone else having this issue today?

Thunderbird is just hanging today. No changes made to anything on PC since it was OK yesterday. Checked online email account and it's fine. TB opens, lets me read an email and reply to it but then it says it's sending to Sent folder but nothing happens and window locks up. Can't close the program apart from through Task Manager. Can't access any menus from top tabs as a very narrow grey box with no options on it pops up when clicked on. Anyone else having this issue today?

Chosen solution

What OS are you using? What Anti-Virus product are you using? Is this an imap or pop mail account?

Is it possible you have an Anti-Virus scanning the outgoing email or scanning the 'sent' folder when accessed?

Please do this test: Exit Thunderbird and all other programs that are running. Reboot the computer in 'Safe Mode with Networking' mode. start Thunderbird and try to send an email. Please report back on results.

Read this answer in context 👍 0

All Replies (4)

more options

Seçilmiş Həll

What OS are you using? What Anti-Virus product are you using? Is this an imap or pop mail account?

Is it possible you have an Anti-Virus scanning the outgoing email or scanning the 'sent' folder when accessed?

Please do this test: Exit Thunderbird and all other programs that are running. Reboot the computer in 'Safe Mode with Networking' mode. start Thunderbird and try to send an email. Please report back on results.

more options

Even more strange - it's back to normal today. Still no changes made to anything here! Thank you for your suggestions though. I wonder if the server was having issues.

more options

Are you using a verizon aol yahoo account ? Just wondering because there have been several reports of issues sending.

more options

No. Hotmail, BTinternet, Pipex and Gmail accounts. No problems today though.