I want to host a single server to host email account for several domains.
The server is going to be running onmy home network behind a firewall where incoming port 25 is being blocked by the ISP.
And I don't have a static IP.
I am considering using DynDNS to solve the static IP and SMTP port relay issue (using their MailHop feature).
My question is, does anyone else do this? Are you able to route the other domain's MX records through a single DynDNS account?