Messages in this thread | | | Subject | Re: ipw2100 wireless driver | From | David Woodhouse <> | Date | Thu, 12 Aug 2004 00:21:41 +0100 |
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On Thu, 2004-08-12 at 01:11 +0200, Tomas Szepe wrote: > On Aug-12 2004, Thu, 00:06 +0100 > David Woodhouse <postmaster@infradead.org> wrote: > > > On Thu, 2004-08-12 at 00:56 +0200, Tomas Szepe wrote: > > > Ok, thanks for the warning. Is there any reason why you should > > > be trying to look up postmaster@ from the sender domain upon > > > RCPT TO? > > > > Part of standard verification of sender addresses. You're being offered > > an email.... if you can't send a bounce to the address it claims to come > > from, or if you can't send a mail to postmaster at the same domain, then > > the chances that the mail you're being offered is a fake are high enough > > to warrant rejecting it. > > Ok, I see, but wouldn't an "and" where you write "or" make more sense? :)
Don't think so. I reject the mail _either_ if I can't send a bounce to the user it claims to come from, _or_ if I can't send mail to the postmaster at that domain. Either failure is sufficient to cause a rejection.
I don't accept mail from an invalid user just because I can contact postmaster, and I don't accept any mail from a domain for which I can't contact postmaster (except for mail addressed to postmaster@ one of my domains, which is more permissive in order to assist debugging/reporting problems).
> Anyway, I screwed up in the aliases vs. virtusertable department again.
I saw it was fixed, and I wiped my callout cache so you should be able to send mail to users @infradead.org other than postmaster again.
-- dwmw2
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