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Is there such a thing as an "email proxy"? I want to store email on a "backend" server not exposed to the internet, and have a separate email server that inter
by infogulch 5y ago
Is there such a thing as an "email proxy"?
I want to store email on a "backend" server not exposed to the internet, and have a separate email server that interfaces with the rest of the internet and both sends outbound email (delivers emails sent from the backend) and receives email (forwards them to the backend), but doesn't store any at all. Like a forward+reverse http proxy, but for email.
- Operyl 5y agoThere are a number of services that effectively proxy/filter (and act as the primary MX) that then can forward to your MX. But you still need to deal with going outbound, I suppose.
- infogulch 5y agoYeah that's my point. If you're running your own outbound email server, you might as well run it for inbound as well. I want a "dumb email proxy" so I can forward all email through a stateless $5 VPS with a static IP and not ever need to worry about scaling or securing its storage.
- marcosdumay 5y agoFor email, it's called "relay". Any email server will can do it, it's a very basic email feature. Many services will do it for you (but a few will block it).
- nulld3v 5y agoExactly this. I run this setup personally: mailserver on my home PC with a relay on my Hetzner dedicated server. The relay proxies all inbound and outbound mail, performs spam filtering but stores no mail. I do this because my home PC's IP changes constantly, and my ISP also blocks port 25. Relays are easy to setup, mailcow-dockerized has built in support.