What is a good MTA (e.g. Postfix or something else) setup for a home computer behind a NAT, or a laptop that is not always online?
I've read a lot of Postfix tutorials on how to set it up this way or that, but they are usually geared towards computers that are servers ie they
- have a static IP
- have a domain name
- are always connected to the same network
My requirements are, I guess:
- Ability to redirect mail for local users to another server of my choosing.
- No listening for incoming SMTP connections - outgoing only
- Ability to route outgoing mail via an external SMTP server with authentication (and perhaps encryption)
If not Postfix, I need an MTA which can queue up mails in case it temporarily has no internet connection.