The Data Center that provides my dedicated servers provides up to 256 IP addresses per server,
which means I could have up to 256 domains/sites each with their own dedicated IP address.
In Cpanel/WHM I can just select a radio button for On beside a line
Send mail from the account’s IP address
in the Exim Configuration Manager, and it also reliably creates a record so that a helo name which
equals that domain name is added to the code in each outgoing email.
It would be really great to have a similar feature in Postfix.
Currently I use the procedure shown at
https://www.kutukupret.com/2010/01/02/postfix-bind-sender-domain-to-dedicated-outgoing-ip-address/which works very well, but as its a manual procedure, its time consuming when there are large numbers of domains and IP addresses in each server.
Currently I have several IP addresses in 1 server, and around 6 hosting accounts on each of those shared IP addresses.
It appears that when emails are sent no helo name is included in the code in the email.
Could Postfix please be configured so that a helo name is always included in each outgoing email which equals either the sender's domain name or the name which equals the reverse dns name of the IP address that email is sent from.
Could Postfix please be configured so that for example a server with 20 IP addresses which had 10 hosting accounts setup on each of those 20 IP addresses would send mail using each of those 20 IP addresses as the sending IP address and as above reliably include a helo name in each email
which equals either each sender's domain name or the name which equals the reverse dns name of the IP address that email is sent from.