Surprised there aren't more reports of this. But the past few weeks have been horrible for Thunderbird & al as well so it's not Pegasus problem (which we pretty much knew anyway).

I wonder how many IMAP outlook users (or other IMAP servers) there are in the Pmail community?

Because having an option where IMAP is handled with a set of retries would not be such a bad idea if it's worth the effort. A simple loop that retries 3-5 times might already do the trick mostly. 

Pegasus does have an issue with enough failures though, after 3-4-5 times deleting (or moving or whatever) with every time failing, Pegasus crashes hard. Which is more annoying that the rest of it as you then need to restart, yeah, yeah, locked mailbox mumbo jumbo and finally spend 30 seconds while imap logs in again. If it would just be fail and retry I could live with it if 1 of 10 tries worked, but the crashes is why I just give up and use a browser if I have too many mails under IMAP.

For a few weeks now all IMAP handling of hotmail has been a complete disaster (imap-mail.outlook.com).

It was hopeless ages ago but with the 4.5 or whatever release imap has been fairly ok (except it needs a connection refresh every 1-2 minutes or you get cannot access...). Slow and cumbersome but working.

I'm surprised there are no messages about it (that I could find). No one else with problems? Really? Will dig deeper as I cannot use Pegasus for imap anymore it seems. Accessing 3 mails means 5-7 crashes.

My new favourite error message, NOT! 

"The IMAP server that manages this mailbox or folder has reported an error during the operation you have attempted to perform. The operation cannot be completed."

I have an outlook.com address that I POP periodically throughout the day I I would say that 30% of the attempts fail for a variety of reasons.  Sometimes I will see several sequential failures but I just leave it alone and eventually an attempt will connect.  I know this doesn't help except perhaps to reassure you that it's not just you, and it's not just IMAP.