The blog of Ross Fruen, a .NET consultant

Thunderbird exceeding the maximum number of IMAP connections

As with all precision engineering, a large sledge hammer is sometimes required for delicate adjustments.

Changing the IMAP password used by Thunderbird is a case in point.

A typo when entering the new password into Thunderbird resulted in the email server suspending the account... ho hum.

Should be simple enough to resolve... close Thunderbird, re-enable the account on the email server, restart Thunderbird, attempt to connect again (this time with the correct password) and..

Unable to connect to your IMAP server. You may have exceeded the maximum number of connections to this server. If so, use the Advanced IMAP Server Settings dialog to reduce the number of cached connections.

After changing the "Maximum number of server connections to cache" on the advanced tab of the server settings dialogue, clearing out the save passwords in the Options tab, restarting Thunderbird multiple times the error message was still being displayed.

In desperation the computer on which this copy of Thunderbird was executed was restarted... and the problem was solved!

Add a comment

If you want your comment to appear on this page please complete the form below. Your name and email address are optional, although the latter will be required if you want a response. Your email address will not appear against your comment and will only be used to correspond with yourself (where appropriate).


Thank you for submitting your comment, it will appear here after moderation is complete.


There was a problem sending your comment, please try again.