[edweis]

I would rather have more integrations with third parties rather than this.

My main problem is that I have to put a lot of effort to not use gmail for my business because most of third-parties (like CRMs) work only/better with gmail.

Fastmail team, how about a Gmail compatible API ?

[archb]

Do you mean to access Fastmail as a client for your Gmail-hosted inbox? How about using the fetch feature that moves all emails to your Fastmail inbox, and the 'send as' feature where you can send emails out from your Gmail SMTP via Fastmail. Those two features already exist.

[mths]

Although when setting this up, Gmail really make you feel like they might pull support at any minute.

I wonder if Fastmail could log you in to Gmail in a way that's consistent with Google's security model, similar to how you can "log in with Google" on many services. I'd much prefer it over the app password thing.

[edweis]

Not exactly. I use Fastmail to avoid using Google.

However there are tons of services that require Google (or outlook) to work with your emails.