From: Gareth Hall (garethjohnhallgmail.com)
Date: Wed Aug 10 2005 - 21:24:32 CDT

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I would like to have two separate postfix instances with their own
in/out on a separate IP for each queue.

I've followed the guide at http://www.advosys.ca/papers/postfix-instance.html

I can connect to port 25 on two separate IP's, I've configured each
with different smtpd banners so I can tell the difference.

The first instance I can send email to and it gets delivered fine, but
the 2nd instance it accepts it fine but delivery doesn't take place.

I get this in maillog.

Apr 11 11:50:31 fw postfix/smtp[16119]: fatal: unknown service: smtp/tcp
Apr 11 11:50:32 fw postfix/qmgr[22657]: warning: premature
end-of-input on private/smtp socket while reading input attribute name
Apr 11 11:50:32 fw postfix/master[26747]: warning: process
/usr/local/libexec/postfix/smtp pid 16119 exit status 1
Apr 11 11:50:32 fw postfix/master[26747]: warning:
/usr/local/libexec/postfix/smtp: bad command startup -- throttling
Apr 11 11:50:32 fw postfix/qmgr[22657]: warning: private/smtp socket:
malformed response
Apr 11 11:50:32 fw postfix/qmgr[22657]: warning: transport smtp
failure -- see a previous warning/fatal/panic logfile record for the
problem description

Seems like the 2nd instance is having binding issues with smtpd.

Main.cf (1st instance)
inet_interfaces = int1.localdomain
smtp_bind_address = 10.0.0.1

Main.cf (2nd instance)
inet_interfaces = int2.localdomain
smtp_bind_address = 10.0.0.4

Have tried default master.cf's and a modified one as below -

Master.cf (1st instance)
10.0.0.1:smtp inet n - n - - smtpd

Master.cf (2nd instance)
10.0.0.4:smtp inet n - n - - smtpd

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