On Mon, Feb 27, 2023 at 2:29 AM Tõnu Tammer <tonu=40cert...@dmarc.ietf.org> wrote:
> I am curious to know what the stance is on trailing whitespace within > DMARC records. > > Strictly following the RFC 7489 and the formal specification in section > 6.4, if there is no trailing dmarc-sep with the associated semicolon, > trailing whitespace is not allowed. > > > > For example a record like: "v=DMARC1; p=reject; pct=100 " would be > invalid, > whereas "v=DMARC1; p=reject; pct=100 ; " would be valid. > I think your interpretation is correct, that's what the specification says. A parser would be right to reject it. As an implementer, I would probably tolerate this. Trailing whitespace has almost never been something worth failing on in my experience. I would also suggest that the working group discuss making such tolerance explicit in the bis document if it's not too late to add a small issue for consideration. -MSK, no hat on
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