>> I would have to make sendmail do a getsockname() and a dns lookup
>> after connecting to the remote host.

> You could use l8s.co.uk.
> The ehlo argument doesn't have to match the reverse of the IP used,
> it just has to exist.

That's true for my mailserver, but I know of at least one person whose
mailserver does check that the name matches the address.  (Today, he's
out on the fringe.  As spam gets worse before it gets better, I expect
that to be less and less the case.)

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