[hedora]

I’m continuously surprised to learn about all the little ways Google makes my internet experience worse, even though I don’t use their services.

Is there a reliable way to tell if an account is forwarding to Gmail? That way, you could reserve your spammer tools (not judging you for using them) for gmail users, and treat the rest of your subscribers with the respect you clearly intended.

[relix]

Unfortunately I don't believe this is limited to Google. For example Yahoo lists the same best practices on their bulk sending best practices: https://postmaster.verizonmedia.com/best-practices