Re: [ietf-smtp] on liberality, was MTS-STS_validation

John Levine <johnl@taugh.com> Sun, 04 April 2021 21:13 UTC

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Date: 4 Apr 2021 17:13:19 -0400
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From: "John Levine" <johnl@taugh.com>
To: ietf-smtp@ietf.org
Cc: arnt@gulbrandsen.priv.no
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Subject: Re: [ietf-smtp] on liberality, was MTS-STS_validation
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It appears that Arnt Gulbrandsen  <arnt@gulbrandsen.priv.no> said:
>What John Levine says.
>
>You can say things like "those people should be liberal in what they accept 

That's the most misunderstood quote in the history of the Internet.

What it means is to be liberal when interpreting standards.  For example,
earlier today someone asked about addresses that quote characters that
don't need to be quoted.  One could read the standard either way, so while
I would not send mail with needlessly quoted characters, I wouldn't refuse
to accept them.  What that does not mean is to accept an address with three 
unquoted dots in a row which is obviously forbidden.

R's,
John