postfix – Server won’t receive emails from Instagram

I am having issues receiving emails from instagram to my server domain.

The email works fine (to and from) everywhere else.

Facebook also wouldn’t send to a different email using the same domain.

Any ideas areciated. Many thanks

PS: There doesnt seem to be any error messages in the mail.log

I tried this solution but it didnt solve my issue.
https://forum.iredmail.org/topic16850-failed-to-receive-email-from-instagram.html