I moved my mailing list (all explicit subscribes, plaintext content) from Mailchimp to an SES-based solution in part for better handling of plaintext email, whi

I moved my mailing list (all explicit subscribes, plaintext content) from Mailchimp to an SES-based solution in part for better handling of plaintext email, which is a total afterthought for most of these tools. Since the switch I have experienced minor hard rejection problems with SES that I didn't before, primarily with Apple Mail and rarely with gmail as well. I wouldn't say it's been a huge problem for me, in part because I don't care that much, but as far as I can tell Apple Mail was rejecting 100% of what I sent for a while while gmail just sporadically randomly rejects an email from time to time, not even the same email across multiple recipients.