The network log continuously shows IMAP error (something with PEEK, no chance to copy it). Meanwhile all the mails I have sent (compose windows where I have clicked on "send") are frozen.
right-click, choose 'select all', Ctrl+C - you have copied it
The problem seems to be that only the last 500 lines are shown. Copying the content of the log window will only work by chance when regular messages mixed with errors are rushing through the log window.
see ~/.claws-mail/claws.log
No feedback for three months, so probably a temporary error on server. Feel free to reopen if you have more info.
(In reply to comment #4) > No feedback for three months, so probably a temporary error on server. > > Feel free to reopen if you have more info. It's actually two months, but anyway ;)