Path: ...!weretis.net!feeder9.news.weretis.net!news.misty.com!.POSTED.veps.esmtp.org!not-for-mail
From: Claus =?iso-8859-1?Q?A=DFmann?= <INVALID_NO_CC_REMOVE_IF_YOU_DO_NOT_POST_ml+sendmail(-no-copies-please)@esmtp.org>
Newsgroups: comp.mail.sendmail
Subject: Re: Filtering HELO / EHLO names before MAIL FROM
Date: Sat, 4 Jan 2025 00:43:53 -0500 (EST)
Organization: MGT Consulting
Sender: <ml+sendmail(-no-copies-please)@esmtp.org>
Message-ID: <vlahqp$p22$1@news.misty.com>
References: <vla1k6$o3g$1@tncsrv09.home.tnetconsulting.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
Injection-Date: Sat, 4 Jan 2025 05:43:53 -0000 (UTC)
Injection-Info: news.misty.com; posting-host="veps.esmtp.org:155.138.203.148";
	logging-data="25666"; mail-complaints-to="abuse@misty.com"
Mail-Copies-To: never
X-Newsreader: trn 4.0-test77 (Sep 1, 2010)
Originator: ca@x2.esmtp.org (Claus Assmann)
Bytes: 1500
Lines: 12

Grant Taylor  wrote:

> Is there a method that I can use to filter & reject (return a 5xy error) 
> for bad HELO / EHLO names at HELO / EHLO time?

A milter should be able to do that.
Give it a try and let us know.

-- 
Note: please read the netiquette before posting. I will almost never
reply to top-postings which include a full copy of the previous
article(s) at the end because it's annoying, shows that the poster
is too lazy to trim his article, and it's wasting the time of all readers.