I created a client library to send emails for a webapp.
When the client library makes a connection to the SMTP server, and
then do NOT add Message-Id header, Message-ID (with a capital D)
header is added, and the SMTP server adds a incorrect DKIM-Signature
record 'h' part, invalidating t
I am investigating whether dovecot(https://github.com/dovecot/core/) handles
case insensitive Message-ID headers as per RFC.
I can't raise a support issue with cPanel team
(https://tickets.cpanel.net/review/login.cgi) as that needs an paid account
with them.
There may be an issue with the CPANEL/