Igor Podlesny wrote:
> I noticed that some mailers (sendmail, postfix) in case they allow
> relaying for somedomain.zone also allow relaying for
> subdomain-of.somedomain.zone.
>
> I can accept this as reasonable behavior but would like to know how to
> deny it! :) Also I wish to know what was the actual idea behind this?
Sendmail does _not_ do this by default; you have to specifically
allow it by adding entries to your M4 file from which you build
your sendmail.cf.
If I had to guess, I'd guess that you enabled the domain via a
sendmail.cw file, rather than a virtusertable, or by setting
yourself up as a promiscuous relay.
-- Terry
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