[ILUG] Rewriting addresses in Postfix

[Colm Buckley]

On 6 Mar 2006, at 14:34, Tony Groves wrote:

> I'm up against a problem with Postfix in that I want to rewrite  
> address headers in certain messages but I can't get it to do it the  
> way I want.
>
> An example would be a message sent to an address such as  
> "1234567 at fax". I want to have the To header rewritten as  
> "1234567<fax at domain.com>" (so that the fax number is preserved for  
> the fax server to detect) and the message routed to  
> "fax at domain.com". So, in main.cf I add the line:
>   canonical_maps = /etc/postfix/canonical_maps
> and in canonical_maps:
>   /^(\d+)@fax$/ $1<fax at domain.com>
> and reload Postfix. The result is that the message gets rerouted as  
> intended, and a new X-Original-To header is added showing the  
> original address, _but_ the To header ends up with just  
> "fax at domain.com", losing the fax number.
>
> Can any Postfix expert out there tell me how I can get this  
> working, please?

I suggest you use fax+number at domain.com - that way you don't have to  
worry about the address and comment parts of the To: line being  
separated.  If the domain.com mail receivers accept + as a delimiter  
(as many do), fax+anything at domain.com will be treated the same as  
fax at domain.com.

Hope this helps,

	Colm

-- 
Colm Buckley / colm at tuatha.org / +353 87 2469146 / www.colm.buckley.name