panel.domain.tld ????

[CMs222]

Maybe this will get fixed

have added TLS - SSL certs for mail.domain.tld
tested ALL GREEN

BUT:
when getting bounce back error sending mail
panel.domain.tld is registering as mail server so NOT encrypted emails being sent
when emails do get through to gmail IN THE SPAM box they are showing RED LOCK

is there anyway to change this so only mail.domain.tld
registers as mail server & email greeting server ????