On Thu, 7 Nov 2024, Fehlauer, Norbert wrote:
thanks to all answers. So it is not allowed to use underscores in DKIM selectors but even
large companies are using such selectors. So what's the usual case than? Try to convince
the sender of their problem or ignore the error at all? I guess a typically "it
depends" case. 😉
It's really up to you. I might know some people at Cloudflare but their
usual response when you tell them about DNS errors is "it works OK for
me."
Thanks again for the input from all.
Regards
Norbert
-----Ursprüngliche Nachricht-----
Von: John Levine <jo...@taugh.com>
Gesendet: Mittwoch, 6. November 2024 23:01
An: mailop@mailop.org
Cc: Fehlauer, Norbert <n.fehla...@systema-online.de>
Betreff: Re: [mailop] Underscore in DKIM Selectorname?
It appears that Fehlauer, Norbert via mailop <n.fehla...@systema-online.de>
said:
-=-=-=-=-=-
-=-=-=-=-=-
Hi,
I know that an underscore in DKIM selectornames usually trigger a DKIM neutral
error. I guess
somewhere in the RFC it is stated if an underscore is allowed or accepted. Can
someone please
point out the correct RFC to me?
RFC 6376 section 3.1 says that a selector is a sequence of dot separated
sub-domain items, which is imported from RFC 5321 which says sub-domain is a
sequence of letters, digits, and hyphens, i.e., a host name.
The underscore in the selector is just wrong. I don't know what Cloudflare is
thinking.
R's,
John
Regards,
John Levine, jo...@taugh.com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly
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