Hi guys. I'm inheriting a job that has an email server hosting
several domains, and I'm wanting to move them behind our firewall
and route mail from the main mail server to an offsite postfix
server that will in turn send them out to wherever they need to
go, kind of like my own homemade smarthost. Because of security we
need to keep it all in house, so a paid smarthost isn't an option.
This postfix server will only take mail from the server and send
it out, and return bounce/errors to the main host. It won't accept
any incoming mail.
Edit: I'll number these questions because wow they got out of
hand the more I stressed about completely breaking our email
servers....Here goes...Bear with me please...
1. From what I've read there's not a "smarthost" option in the
setup config. Would I just choose "Internet Site"? Or does it
matter at all if I'm just going to monkey with the conf anyway?
2. And regarding the conf, any tips to make this run smoothly with minimal maintenance?
3. And is there a way to keep logging to a minimum so it doesn't fill up the server?
4. Can I force it to use a different outbound port than 25 so I
can host it on the same machine that hosts our proxy server that
sends traffic to our main server?
5. Our domains only send from 2 IPs, say 4.4.4.4 and 5.5.5.5, but
have 22 different domains they'll send from. Is there a way to
just filter relaying by IP address or would another form of
security be better?
I apologize for all the questions. I'm not a real email guy. I'm
just a guy that fell into this job because everyone else was even
worse equipped to handle it than me. A step by step would surely
be appreciated.
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