[Mimedefang] Domain canonifyin​g and RFCs

[kd6lvw at yahoo.com]

--- On Thu, 10/13/11, Ernst du Plooy <eduplooy at gmail.com> wrote:
> ... 
> Currently Sendmail still rewrites the sender domain.  Does this mean
> that the default behaviour of Sendmail is not RFC compliant or are
> there other RFCs that still limits the use of CNAMEs with MX records
> (maybe RFC 1034 section 3.6.2)?

No.  It means that the default setting for sendmail is for RFC compliance, but rewriting (canonicalization) may be disabled (as you noted with the configuration option).