I'm running Postfix with MailScanner as a spamfilter for multiple domains/customers. Is it possible to create a TLS configuration to force encryption for a set of domains with one 1 SSL certificate for the FQDN of the mailserver? The MX-records of the hosted domains are pointing to my mailserver and my mailserver is forwarding the mail to the destionation mailserver of the customer. Does the SSL certificate need to contain the domainnames of the destination domains? Or is the FQDN of the active mailserver enough for good encryption?
Thanks in advance.
