Mailing List Message #95990
From: たまちゃん <>
Subject: Re: greylisting with CGPro
Date: Sat, 06 Sep 2008 07:28:40 +0900
To: CommuniGate Pro Discussions <>
Mark Nipper wrote:
> That's incorrect. Even RFC 821 (
> states that a client should retry after receiving a 400 level message.
> This might be ignored by much older clients of course, but there's
> nothing much to be done about substandard implementations.

RFC 2821 states that the SMTP client is "encouraged" to try again.

> Either way, you always risk losing legitimate mail by greylisting.

I totally agree with you. :-)

たまちゃん /
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