Markus Stumpf <[EMAIL PROTECTED]> writes on 12 January 2001 at 02:47:26 +0100
> I am going to patch qmail-smtpd to have a maximum number of rcpt to's
> it will accept in one session. (I regularily see spammers that try
> to send to a lot of (valid) adresses in one bulk).
> The value I am thinking of is around 20 and after that I will reject
> the recipients with a "451 Too many recipients." message.
>
> Looking at RFC821 I find (Page 42)
> recipients buffer
> The maximum total number of recipients that must be
> buffered is 100 recipients.
>
> Thus this patch would violate RFC821. Do you think this violation is
> critical? A correctly implemented smtp server should resend those
> "451 ack'd" addresses anyways, shouldn't it?
>
> Hmmm ... thinking about that quote (maybe it's my bad english) does that
> make a sense at all? What's the meaning? Wouldn't
> The MINIMUM total number of recipients that must be
> buffered is 100 recipients.
> make more sense if one would like to impose a limit?
It's certainly a funny sentence. It could be interpreted to forbid
supporting more than 100 recipients in one transaction; I wonder if
that was the intention, though?
Setting a minimum seems more likely than setting a maximum, but that
sentence clearly doesn't set a minimum.
> And why (some lines later at that page) would one reject too many
> recipients with a "552 Too many recipients.", i.e. a permanent failure
> code instead of a 4xx temporary code?
No clue, sorry.
--
David Dyer-Bennet / Welcome to the future! / [EMAIL PROTECTED]
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