Re: outgoing SMTP and dynamic DNS
On Tue, Mar 03, 1998 at 10:20:33PM +1300, Carey Evans wrote:
> If the host gets picky about "EHLO psyche.evansnet" I'd be in trouble,
> but it's then non-compliant.
Actually, I think smail 220.127.116.11 does this by default. Or at least, it
gets seriously upset about "EHLO localhost" and probably others as well.
(I can't test this right now -- I downgraded to 18.104.22.168 from bo because
it was being ridiculous.)
Now, I would be happy to agree that it's non-compliant. It's also
braindead: if you know the remote hostname well enough to properly validate
the EHLO, why do you need the EHLO to be correct anyway?
Sendmail has done it exactly that way for a long time:
250 mail.somewhere.org Hello ppp-annex-0117.mtl.accent.net
[22.214.171.124], pleased to meet you
Trusting the HELO line is bad. Validating it is worse. I don't think
anything but the new smail does the latter.
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