Simplelogin doesn't do SRS which is pretty bad for this time and age.

That makes emails forwarded from, say, PayPal or ebay marked as scam/phishing in Gmail, AND makes it impossible to report actual spam that comes through.

With a well set up SRS all these emails are recognised correctly. SimpleLogin does some naïve forwarding which messes it up.

I'm migrating out of them exactly for this reason - if I could do it on my hobby server for my personal domains, THEY should be able to do it as well.