Is it possible for Postfix to relay mail through another SMTP server? In other words:
[sender client] -LAN-> [Postfix SMTP] -slow-> [some other SMTP] -> [recipient's SMTP] -> [recipient's client] .. where "Postfix SMTP" would relay via "some other SMTP" all outbound email it accepts to queue? The reason I'm thinking about this is that the outbound link from the "Postfix SMTP" is slow in this setting, and does not have a static IP (this is not the same location than the "cache" server discussed in the other recent thread). If the email could be relayed via an external SMTP server which is authorized to send mail for the sender's domain, and which has a static IP, the outbound mail would be queued faster, yet the mail would be ultimately sent out from a server whose domain name could be reversed to a static IP. Thanks for any insights on this, Ville
