The current IMAP implementation seems to work quite well, but it requires a live internet connection to access emails. It would be much more useful (and faster) if it could:
1. Download the whole email (not just the header) for all emails in all folders, in case there are internet problems (and as a backup - I don't trust GoogleMail).
2. Keep the IMAP folders synced with user changes (moves & deletes), even if there is no internet connection at the time. Make sure to detect "mass deletions" during sync, and confirm whether the user really wants this (in case there was a bug or user error).
IMAP is getting *essential* these days, because it is common to want to use multiple devices (e.g. smartphone, laptop & desktop) to access the same email account. Using POP3 doesn't really cut it anymore, and so I am finding it very hard to continue using the Amiga for handling emails. SimpleMail's current IMAP implementation isn't quite sufficient.
I added at least 1. 2 probably needs more time and won't make it in the next release.