On 21 Jan 2018, at 20:44 (-0500), li...@lazygranch.com wrote:
The reverse DNS can only point to one domain name.
Not so. Multiple PTR records for one address may violate some people's expectations, but it's not wrong if the address doesn't really have a public name that is more "real" than the others.
If you are hosting multiple domains on one server,
Niggle: not one server, one IP address. A server can have many IP addresses and there's a long history of people asking here how to make Postfix use specific IPs for specific domains, for essentially cosmetic reasons. The multi-instance support mostly ended that FAQ.
all MX records should point to the domain name that has the PTR record.
That really makes no difference. It is arguably good practice to have a PTR reversing every A record but simplicity is arguably more important, so having just one A and one PTR for each name/IP pair is fine, even if that IP is handling mail for many domains.
-- Bill Cole b...@scconsult.com or billc...@apache.org (AKA @grumpybozo and many *@billmail.scconsult.com addresses) Currently Seeking Steady Work: https://linkedin.com/in/billcole
