[Mailman-Users] problems with the mail hostname

Guillaume Rousse rousse at ccr.jussieu.fr
Tue Mar 9 23:57:43 CET 2004

Rabinowitz, Ari (Exchange) wrote:
>>From: Guillaume Rousse Saturday, March 06, 2004 10:20 AM
>>I'm having troubles with the name used by mailman for sending 
>>mails: it 
>>keeps using the real hostname, whereas it is configured for 
>>using an alias.
>>All list configuration says also host_name is lists.zarb.org, 
>>all URLs 
>>are OK, but it keep sending mails as @katu3.zarb.org, instead of 
>>@lists.zarb.org. What is wrong there ?
> What is wrong is that you have defined lists.zarb.org as a CNAME 
> pointing to katu3.zarb.org.  RFC 821, the original definition of 
> SMTP said that ALL Email should come from the canonical name of 
> the server, so older versions of sendmail and postfix, and possibly 
> other MTA's automatically change the From address to show the actual
> hostname of the sender rather than the CNAME alias which you want.
console mails comes from @zarb.org, not @katu3.zarb.org, as postfix is 
configured to use @mydomain.

> The only way to be sure that this will work is to remove the CNAME 
> record for lists.zarb.org and put in an A record in DNS.
Unfortunatly, it was not enough :-(
As soon as a still-to-be-finished computer task becomes a life-or-death 
situation, the power fails.
		-- Wood's Axiom

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