I had tons of issues with mailman added headers causing entire HTML messages to be interpreted as plain text, rendering their encoding tags visible. I think they fixed this. I was still a bit surprised that this was an issue 1+ years into the IMAP bridge.
Big plus is that if you complain about this to their support things actually seem to get fixed? That was kind of a shocker, I'd suggest sending them a note if you have issues. Though this particular IMAP transfer between accounts has worked between my other email accounts (exchange and some linux server long ago) and gmail since I first tried it so it's a little sad. But a smaller team I guess? But paying for it so...
Big plus is that if you complain about this to their support things actually seem to get fixed? That was kind of a shocker, I'd suggest sending them a note if you have issues. Though this particular IMAP transfer between accounts has worked between my other email accounts (exchange and some linux server long ago) and gmail since I first tried it so it's a little sad. But a smaller team I guess? But paying for it so...
Mixed feelings for sure.