The right hand side of a SRV record is a hostname, not an email address.
(Trivially worked around in at least two obvious ways).
I don't see any obvious ways, unless you really mean "node in the DNS
tree" rather than "hostname". Am I missing something? It seems to me
that 2782 specifies that the target really is a hostname, thus making
it impossible to shoehorn an email address in there without (a)
imposing artificial restrictions on its local-part and (b) creating
artificial address records that do not actually make sense...or
ignoring SRV's spec, in which case the case for using SRV strikes me as
significantly weaker.
Of course, this could be finessed by the spec behind this use
(abuse, arguably, in view of its deviations from the spec) of SRV.
Also, support for looking up SRV records is even rarer than TXT or
MX.
There's that. But I can't really feel it's much of a barrier to anyone
who's gotten past the decision to implement anything even vaguely
TiSish in the first place.
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