Relay over port 25
- Thread starter admail
- Start date
you have the following options depending on your particular setup:
* if the PMG has 2 IP-addresses (one used for internal communication/those subnets) - you can have the listeners for internal and external listen to the explicit addresses (instead of different ports) - you need to use the templateing system to adapt the postfix configuration for that:
https://pmg.proxmox.com/pmg-docs/pmg-admin-guide.html#pmgconfig_template_engine
* if you have a router/firewall between those subnets and PMG you can configure a NAT (actually PAT for port address translation) rule there
* finally you can create an iptables/nftables rule directly on PMG
(there are quite many tutorials on the net for each of the options)
I hope this helps!
* if the PMG has 2 IP-addresses (one used for internal communication/those subnets) - you can have the listeners for internal and external listen to the explicit addresses (instead of different ports) - you need to use the templateing system to adapt the postfix configuration for that:
https://pmg.proxmox.com/pmg-docs/pmg-admin-guide.html#pmgconfig_template_engine
* if you have a router/firewall between those subnets and PMG you can configure a NAT (actually PAT for port address translation) rule there
* finally you can create an iptables/nftables rule directly on PMG
(there are quite many tutorials on the net for each of the options)
I hope this helps!
Not quite sure what you mean with the mechanism - but roughly said - mails on the external port are accepted if they are for a domain listed as relay domain.
I hope this explains it