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From: Grant Taylor <gtaylor@tnetconsulting.net>
Newsgroups: comp.mail.sendmail
Subject: Re: Filtering HELO / EHLO names before MAIL FROM
Date: Sat, 4 Jan 2025 17:03:27 -0600
Organization: TNet Consulting
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On 1/4/25 14:03, Claus Aßmann wrote:
> Yes, esp. 421.
> Maybe that's the best for your problem?

I'll have to evaluate the temp fail.

> But any command other than QUIT (and a few others which do not start 
> a transaction) will be rejected, correct?

The command(s) that I tested do end up getting a 5xy error after causing 
the reject.

I would have hoped there was a 5xy series error that could be returned 
when sending the SMFIS_REJECT (?from memory?) in response to the helo 
callback.

I need to reference some RFCs to see if such is even allowed.



-- 
Grant. . . .