I still get the same problems as you do, Addison. It seems to be only with gmail, and like you I tried re-setting up Gmail account and it wouldn't let me save it. I think it's because I had my old one still, and perhaps it saw the same imap and smtp address -- but I created a new 'Gmail2' account (which saved just fine) and that one still did not connect at all.

But just two days ago I set up Modest to work with IMAP just fine for my work account. It connects, downloads, sends -- everything.

I wonder if it's something with gmail or some certificate like you show? I have been using the secure gmail connection (https) for a few years now and can't imagine that is what's causing the problem.

I will search around and see if I can completely uninstall all Modest settings and see if that makes a difference.

I might try seeing if POP works for gmail, which I haven't tried in a while (just IMAP).

I had been using Claws Mail lately, but I really like the simple, non-bloated feel of Modest.