There are two methods: 1) overload the root TXT record example.org TXT "blah" 2) use a CNAME like _blah.example.com CNAME _blah_google.com
The first method, overload the SPF record with extra information that needs to be returned every-time you query for the SPF record. It may then pass the limit of a single 1500 bytes packet, therefore some UDP fragmentation must occur or move to TCP..... The time the fallback happens, may be too long in some cases for your mail server to get the data "in time". The second method does not have this issue, but it is harder to find such record for us humans.... On Mon, Jul 13, 2015 at 8:22 AM, Matthew Black <matthew.bl...@csulb.edu> wrote: > Jesse Thomason> Can the TXT record be removed after Google's verification? > > According to Google, no. They claim it will be tested periodically. > > I hadn't considered the DNS lookup issue for SPF mentioned previously. I > thought the ten lookup limit applied once you located the correct DNS > record. Google should have been more considerate and required a record, > such as, _google-pm.domain.tld. > > > > > matthew black > california state university, long beach > > > _______________________________________________ > mailop mailing list > mailop@mailop.org > http://chilli.nosignal.org/mailman/listinfo/mailop >
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