[ILUG] I thought you didn't have to fight postfix...

[Conor Daly]

On Mon, Jun 03, 2002 at 03:28:41PM +0100 or so it is rumoured hereabouts, 
Gary Coady thought:
> On Sun, Jun 02, 2002 at 08:22:58PM +0100, Conor Daly wrote:
> > Well, I'm fighting with it.
> > 
> > setup I have is a dialup internet account with a single email address.  I
> > want to use that email address with "+" extensions to provide mail for
> > multiple users (eg. "mailaccount+user at isp.net"  to be delivered to
> > "user at server.localdomain").
> 
> Okay, firstly I haven't had to do any of this before, but it might actually
> be correct, and it should give you an idea of how to solve your problem :)
 
That pretty much did it...  Only thing is it's rewriting the addresses for
mail from local users to local users where it shouldn't.  I'll have to
figure that out next.

Two caveats...

1. my version of postfix (postfix-1.1.7-6 in RH RPM) doesn't support pcre
expressions (Found that out with "postconf -m").  Instead I've used regexp
thus:

recipient_canonical_maps = regexp:/etc/postfix/recipient_map.regexp

# /etc/postfix/recipient_map.regexp
# This is for testing only
/^mailaccount\+(.*)@isp.net/   ${1}@server.localdomain

and:

sender_canonical_maps = regexp:/etc/postfix/sender_map.regexp

# /etc/postfix/sender_map.regexp
# This line for testing only...
/^(.*)@(.*)$/!/^mailaccount+/        mailaccount+${1}@isp.net
             ^^^^^^^^^^^^^^^
2. Note the negation above.  If I leave that bit out, the final address ends
up with 10 iterations of "mailaccount+" prepended!  I guess the canonical
rewrite is being done multiple times.


> First of all, use in main.cf:
> recipient_canonical_maps = pcre:/etc/postfix/recipient_map.pcre
> 
> # /etc/postfix/recipient_map.pcre
> # Rewrite domain+user to user - I don't think the address is re-run
> # through trivial-rewrite, so add the domain here.
> /^mailaccount\+(.*)@/	${1}@server.localdomain
> 
> > I also want to rewrite outgoing mail from
> > "user at server.localdomain" to "mailaccount+user at isp.net".  
> 
> And here in main.cf:
> sender_canonical_maps = pcre:/etc/postfix/sender_map.pcre
> 
> # /etc/postfix/sender_map.pcre
> # Rewrite user@ to mailaccount+user at isp.net
> /^(.*)@/	mailaccount+${1}@isp.net

Thanks,

Conor
-- 
Conor Daly <conor.daly at oceanfree.net>

Domestic Sysadmin :-)
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