Have you already tried <https//www.mail-tester.com/>? It’s quite useful to see what’s missing

writen by Benedikt
Thanks Benedikt That’s a useful service. I got a 9.1/10 when sending from mailchimp. So that’s pretty good, but I’ll look at the improvements

writen by Philip
It might have ended up there because it isn’t being opened - have you asked why?

writen by Maxwell Davis