On http://tools.ietf.org/html/rfc1034 4.3.2 specifies the DNS algorithm. If a CNAME is found then redo the search till the original record type is found.
For the reports use a wildcard: *._report._dmarc.example.com TXT "v=DMARC1;" From: paul howe <[email protected]<mailto:[email protected]>> Reply-To: paul howe <[email protected]<mailto:[email protected]>> Date: Wednesday, November 14, 2012 9:34 PM To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>> Subject: [dmarc-discuss] Multiple parked domains We have ~700 parked domains which shouldn't generate mail (spf = -all), but I want to hear about it if they do. I'm not looking forward to generating 700 entries with rua/ruf addresses plus 700 verification records in our primary domain for each of the parked domains. What is the most efficient and maintainable implementation? e.g. _dmarc.parked1.com txt vDMARC1;p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; pct=100; sp=reject _dmarc.parked2.com txt vDMARC1;p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; pct=100; sp=reject etc. and then in example.com creating all the verification records. parked1.com._report._dmarc.example.com v=DMARC1; parked2.com._report._dmarc.example.com v=DMARC1; etc... I did find this: http://www.dmarc.org/pipermail/dmarc-discuss/2012-June/000792.html which suggests using cnames on the parked records, which at least means I don't need to edit each parked record if the reporting mailbox changes! _dmarc.parked1.com cname _dmarc.template.example.com _dmarc.template.example.com txt vDMARC1;p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; pct=100; sp=reject Thanks.
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