Hi, In the last few days I was trying to figure how many ("home run" , "small businesses" or academic ) domains had setup MTA-STS .
Out of 20 domains on this and other mailing lists; only two had MTA-STS. I have seen that gmail, outlook and gmx have it, but they are not small nor home run. As for domains that use providers with MTA-STS, I may be wrong, but It does not seem that the domains that use such providers had setup delegation. ( https://tools.ietf.org/html/ rfc8461#section-8.2 ) . Why is it so rarely used ? Why customers of providers that provide MTA-STS do not setup it for their own domain ? Test for domain.seclvl.cctld done by : 1.Check if there for txt record for _mta-sts.domain.seclvl.cctld dig +short -t txt _mta-sts.domain.seclvl.cctld positive result : "v=STSv1; id=20190101T020202;" negative result: no result. 2. fetching .well-known/mta-sts.txt Good result : version: STSv1 mode: testing mx: smtp.domain.seclvl.cctld max_age: 86400 bad result: HTTP 404, 403 etc .. p.s. the RFC itself https://tools.ietf.org/html/rfc8461 _______________________________________________ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il