User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:22.214.171.124) Gecko/20080311 Firefox/126.96.36.199 Build Identifier: 188.8.131.52 / 20080213 When Thunderbird reports "Your account is almost full in a pop-up warning" it doesn't say *which* account, leaving you to guess. Reproducible: Always Steps to Reproduce: 1.Have more than one incoming mail account 2.Allow one account to become 90% full 3.Log in to Thunderbird. 4. You will get a message: "Your mailbox is almost full. When it reaches 100%, you will stop receiving mail." 5. Check every single mail account manually to see how full it is. Actual Results: The above message is sent by the mailhost. However, the Thunderbird pop-up does not identify which mail host sent the message, leaving you to guess. Expected Results: Mailhost messages should be prefixed with the name of the mailhost or account they are from.
That seems to be a generic message sent from the server. Which makes this a duplicate of bug 66860.