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by gerdesj 726 days ago
You only need one IP per MTA not per domain. I have a "vanity" email system that I run at home. I run it for my mates too. I have around 10 domains inbound. It all works fine.

SMTP and SIP are often held aloft as fucked up. My Dad's home telephony runs off a RPi and a Yealink DECT station and a dynamic DNS.

The modern internet might look a bit fucked up if you only look at the X/Facebook/webby wankery stuff but the real internet is functioning quite happily.