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Re: /usr/sbin/sendmail specification proposal, draft 4

> Previously H. Peter Anvin wrote:
> > I think SMTP delivery to the localhost SMTP port should be permitted
> > as a matter of course (this basically means that sendmail should be
> > set up to have relay permission on the localhost address; I believe
> > this is standard for obvious reasons.)
> I disagree. I don't see why we should enforce people to open up a local
> SMTP port. It's not even a standard option for most MTAs do that.

exim actually has to be specifically told to allow local relaying. Many
admins don't like this. Also it breaks our future planning badly.

What happens when IPv4 has gone away ?


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