Tony Finch wrote:
> On Sat, 12 Feb 2005, Andrzej Adam Filip wrote:
>
>>In short: "rejecting in greeting message" (5?? or 4??) can be used as a smart
>>way to hint "try your ISP relay".
>
> The problem with doing this is that it prevents people contacting your
> postmaster. This is why Exim installations usually implement all their
> policy-based rejections after RCPT.
After RCPT rejecting is not the best choice for rejecting only *direct*
submissions from DUL IPs and sending "use your ISP smart host" in "MTA
readable" format.
4?? reply after "RCPT TO:":
may make the sending host repeat delivery attempt at every queue run
(e.g. every 30m for 5 days)
5?? reply after "RCPT TO:":
makes almost all sending quit all delivery attempts by any relay
5?? code in *greeting message*:
makes some sending MTAs (sendmail and postfix) to try delivery via
"fallback relays" - it makes "5?? Listed in ... as DUL" greeting a good
way to say "use your ISP smart host" for host that strongly insist on
avoiding using smart host whenever possible.
P.S.
I "unintentional" change has happened in sendmail-8.13.2
(I wrongly wrote about 8.13.3)
Date: Wed, 05 Jan 2005 16:24:40 +0000
From: Mark Tranchant <...>
Newsgroups: comp.mail.sendmail
Subject: FallbackMXHost broken in 8.13.2?
Message-ID: <41dc14ca$0$47609$ed2619ec@???>
--
Andrzej [en:Andrew] Adam Filip anfi@??? anfi@???
Home Page
http://anfi.homeunix.net/
