[Mimedefang] Domain canonifyin?g and RFCs

David F. Skoll dfs at roaringpenguin.com
Wed Oct 19 13:12:59 EDT 2011

On Wed, 19 Oct 2011 16:45:04 +0200
Ernst du Plooy <eduplooy at gmail.com> wrote:

> It seems that RFC2821 legalised the use of CNAMEs and Sendmail should
> not rewrite it anymore (the information above seems to be out dated).

I agree.  Sendmail's gratuitous rewriting of envelope and sometimes header
addresses is extremely annoying.  It's a relic of the past.

> Like I mentioned I can fix my sendmail behaviour with the
> confDONT_EXPAND_CNAMES option.  I would however like to find proove
> that the behaviour of sendmail is still valid.  The reason I don't
> want to implement confDONT_EXPAND_CNAMES is that I currently use this
> server to rewrite the sender domain on purpose for an internal server.

You can use other rules to rewrite internal domains.  I think
confDONT_EXPAND_CNAMES should be the default.



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