Hello,

Should that count as a consensus, or would others like additional information?

Thank you

--
Alex Brotman
Sr. Engineer, Anti-Abuse
Comcast

From: Daniel Margolis [mailto:[email protected]]
Sent: Tuesday, July 17, 2018 9:32 AM
To: Brotman, Alexander <[email protected]>
Cc: [email protected]
Subject: [EXTERNAL] Re: [Uta] TLSRPT mx-host-pattern

+1 for a JSON array.

On Mon, Jul 16, 2018 at 11:43 PM Brotman, Alexander 
<[email protected]<mailto:[email protected]>> wrote:
Hello,

While someone was beginning to write their code for TLSRPT, they noticed that 
mx-host-pattern is under specified.

   o  "mx-host-pattern": The pattern of MX hostnames from the applied
      policy.  It is provided as a string, and is interpreted in the
      same manner as the "Checking of Wildcard Certificates" rules in
      Section 6.4.3 of [RFC6125].  In the case of Internationalized
      Domain Names ([RFC5891]), the domain MUST consist of the Punycode-
      encoded A-labels ([RFC3492]) and not the U-labels.

https://tools.ietf.org/html/draft-ietf-uta-smtp-tlsrpt-23#section-4.4

So, the questions arises when for instance one is using MTA-STS and has two MX 
allowed patterns and how that should be noted in the report field.  I'd like to 
suggest we use a JSON array, as the report is already in JSON.  An alternate 
would be a simple string.  I wanted to see if the WG had any objections to this 
change.

Thanks for your time.

--
Alex Brotman
Sr. Engineer, Anti-Abuse
Comcast


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