Simon wrote: “Now if this were just a free email service for private use that would be one thing, but in my case Google is selling a commercial grade product to a large public university who has acquired it with the purpose of deploying it in a “corporate setting””
We’re now stuck with choosing between G Suite and Exchange; our real imap server turns into a pumpkin soon. Either is a poor choice on a number of grounds, but given that Exchange has actual delivering the mail trouble several times a year that can last for days, G Suite is probably the least bad option. At least gmail keeps their servers going.
One of the more important settings is whether the All Mail label is shown to imap. By default it is, and it confuses Mail badly because Mail sees them as duplicates (which they are), and Mail hates duplicates. You can turn All Mail off in the gmail web settings - Labels tab, find All, and uncheck it for the imap column. While there it’s probably worth while looking at the others to make sure that all of the ones you want are actually being served out.
The other gmail annoyance is that Mail.app saves frequently while composing. It deletes older versions promptly so they don’t pile up on most servers. But Google doesn’t often honor the deletes, so if you keep your Drafts folder on the gmail server, you can end up with thousands of saved versions in short order. If you don’t keep it on the server, you don’t have access to partly written messages. So that setting depends on your preferred balance between your usage and your irritation level.
Other than those, there haven’t been too many complaints here. (But I’m staying off of it until the final hour anyway…)