What I was suggesting...
KSysGuard shows that yahoo feeds data to Thunderbird in very teeny chunks. A message with
an attached photo took about an hour to download yesterday. I also access my e-mail from
multiple workstation accounts and operating systems. So some time ago, I set all my
e-mail accounts to
*** not ***
keep messages on my workstation. That is, "Message Synchronizing": "Keep
messages for this account on this computer" is unchecked. So messages have to be
re-downloaded after every Thunderbird launch and account sign-in.
In a terminal....
Yes, I use IMAP.
bash.4[~]: export MOZ_LOG_FILE=/[myhome]/thunderbird/log
bash.5[~]: export MOZ_LOG=IMAP:5,timestamp
bash.10[thunderbird]: thunderbird &
(I assume putting it in the background makes no difference in the logging.)
I tried it a few times. I saw the same misbehavior as yesterday, but the log file
remained empty. I also tried it without the ampersand. The log file is empty. There are
no subdirectories or other files in "/[myhome]/thunderbird/".