Hello,
After updating the developer certificates for my developer account, an email sent from our REGISTERED domain is not properly relayed to the private address.
The email has been bounced back to our sender with a
"550 5.1.1 Relay not allowed"
Our speculation is, by updating the developer certificate will cause an direct impact on our associated domain, regarding the "apple-developer-domain-association.txt".
We need a clear answer for why our relay was not working, due to yearly updates for our certificate will always cause disruption for our service if this speculation is true and is unexpected from our end.
Thanks in advance,
y4m4p