Re: [ietf-smtp] [Emailcore] Proposed ESMTP keyword RCPTLIMIT

John Levine <johnl@taugh.com> Mon, 15 March 2021 17:48 UTC

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Date: 15 Mar 2021 13:48:28 -0400
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From: "John Levine" <johnl@taugh.com>
To: ietf-smtp@ietf.org
Cc: ned.freed@mrochek.com
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Subject: Re: [ietf-smtp] [Emailcore] Proposed ESMTP keyword RCPTLIMIT
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It appears that Ned Freed  <ned.freed@mrochek.com> said:
>> Thanks.  I noted that parameters for the "LIMITS" keywork are ";" delimited,
>> that's not the common pattern in EHLO keywords, where e.g. SASL mechanisms,
>> are space-separated.
>
>(I was wondering if anyone would notice this.)
>
>It may be a common pattern - and in fact it's what I used initially. But then I
>checked, and it's actually syntactically invalid according to RFC 5321:
>
>   ehlo-line      = ehlo-keyword *( SP ehlo-param )

I must be missing something.  It looks to me like a keyword followed by a
space separated list of parameters.

Like, say, this:

220 smtp.gmail.com ESMTP e190sm12987109qkd.122 - gsmtp
ehlo pedro
250-smtp.gmail.com at your service, [2001:470:8d03:c0d:503e:8cc:f15b:bf7d]
250-SIZE 35882577
250-8BITMIME
250-AUTH LOGIN PLAIN XOAUTH2 PLAIN-CLIENTTOKEN OAUTHBEARER XOAUTH
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-CHUNKING
250 SMTPUTF8
quit

R's,
John