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RFC 8461, "SMTP MTA Strict Transport Security (MTA-STS)", September 2018

Source of RFC: uta (art)

Errata ID: 6285
Status: Reported
Type: Technical
Publication Format(s) : TEXT

Reported By: Paul Buonopane
Date Reported: 2020-09-10

Section 3.1 says:

sts-field-delim = *WSP ";" *WSP

It should say:

sts-field-delim = ";" *WSP

Notes:

The following text appears within the same section:

> If multiple TXT records for "_mta-sts" are returned by the resolver, records that do not begin with "v=STSv1;" are discarded.

The current definition of sts-field-delim is incompatible with that instruction. Either the instruction needs to be changed, a new delimiter needs to be defined that doesn't permit whitespace before the semicolon, or sts-field-delim needs to be modified.

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