-1. The v= tag description is accurate. There is no current DKIM design expectation for any other string value. The current spec is `v=DKIM1`. Any software writing `v=DKIM1.0` is technically “broken” and should not be encourage to exist or perpetuate.
IOW, software should not process the record if it’s not literally `v=DKIM1` and if the `v=` tag is missing, the default is `v=DKIM1`. If software want to consider preparing for the future with different v= tag string values describing an extended DKIM specification, it is always possible to have this. But for the current spec and standard, `v=DKIM1` is the only expectation, not `v=DKIM1.0` — there is no spec for this and the current spec is clear DKIM1 and DKIM1.0 are not the same, Thanks — HLS > On Mar 10, 2023, at 1:46 PM, Jan Dušátko <jan=40dusatko....@dmarc.ietf.org> > wrote: > > Dear, > I got recommendation to propose changes in that mailing group. > My work depend on appropriate protection of our brand, however this tasks > require also management of records required for that protection. We have huge > problem with identification of selector records required by DKIM and also > this make for us problem with compatibility. We would like to strongly follow > RFCs, but sometimes v=DKIM1 tag are resolved like issue as well as sometime > missing of that tag do the same. This is a reason, why I would like to > propose mitigation of problem, caused by word RECOMMENDED in standard RFC > 6376: > > v= Version of the DKIM key record (plain-text; RECOMMENDED, default > is "DKIM1"). If specified, this tag MUST be set to "DKIM1" > (without the quotes). This tag MUST be the first tag in the > record. Records beginning with a "v=" tag with any other value > MUST be discarded. Note that Verifiers must do a string > comparison on this value; for example, "DKIM1" is not the same as > "DKIM1.0". > > I would like to recommend change work RECOMMENDED to MANDATORY, where whole > article be after change > > v= Version of the DKIM key record (plain-text; MANDATORY, default > is "DKIM1"). If specified, this tag MUST be set to "DKIM1" > (without the quotes). This tag MUST be the first tag in the > record and this tag must exist. Records beginning with > a "v=" tag with any other valueMUST be discarded. Note that > Verifiers must do a string comparison on this value; for > example, "DKIM1" is not the same as "DKIM1.0". > > >
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