1409678 - IMAP email message actually not sent despite of copied to Sent folder when server connection error occurs

Status: RESOLVED DUPLICATE of bug 780124

(Thunderbird :: General, defect)

Description

[Petr Vones]

Sometimes I receive error message "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." when sending a new email.

I understand such error can occur but the issue is the email is moved from Drafts to Sent folder despite of it was NOT actually sent.

See also Bug 1390442.

Comment 1

[Jorg K (CEST = GMT+2)]

Gene, please take a look, also at bug 1390442.

Comment 2

[gene smith]

I will look closer at this but it sounds like the error is in regard to imap connections. Without an IMAP + SMTP log I can't really tell that the email was not actually sent. (Does the reporter have evidence that the mail was not sent?) Since sending email doesn't use imap but uses smtp and the quoted error message seem to mention only imap, then maybe the message was actually sent and being moved to Sent folder is correct?

The other Bug  1390442 does sound like it only involves sending and is not intertwined with imap. In any case a log of the imap and smtp transaction for this bug when the error occurs would be helpful.

A setup like this to capture both imap and smtp can be done:

set MOZ_LOG=SMTP:5,IMAP:5,timestamp
set MOZ_LOG_FILE=%USERPROFILE%\Desktop\imap.log
"%ProgramFiles(x86)%\Mozilla Thunderbird\thunderbird.exe"

See this for more details: https://wiki.mozilla.org/MailNews:Logging

Comment 3

[gene smith]

See my observation on bug 1390442. Maybe there's a common cause for both bugs.

Comment 4

[Petr Vones]

I enabled the logging. Unfortunately the bug occurs once per week so it isn't easy to catch. Still serious because emails are important for me and must be reliable.