Michael Milligan wrote: > You just don't get it. You are off wandering around in the weeds. > > Read the tail end of Chapter 5 in the book "DNS and BIND" describing the > MX selection algorithm in layman's terms to (perhaps) understand why > having MX records referencing CNAMEs is bad. > > It may work right now for you, but referencing CNAMEs in MX records > eventually _will_ cause delivery loops the next time you accidentally > fat-finger a config. If you continue to be hard-headed about this and > not listen to the 100s of years of collective wisdom dispensed, then go > ahead and leave yourself set up for a potential DoS against yourself, > we're not going to stop you... and we're not going to feel sorry for > you either.
There are plenty of ways to get a mail loop that don't involve DNS mis-configuration. As such pretty much every major MTA detects and stops mail loops. So mail loops are a non-issue ... next? ds > FIN > > Regards, > Mike > > Al Stu wrote: >> Analyze this. >> >> Query MX dns.com >> >> Response MX nullmx.domainmanager.com >> >> Query A nullmx.domainmanager.com >> >> Response CNAME mta.dewile.net, A 64.40.103.249 >> > > _______________________________________________ > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Environmental thought: print this email in triplicate! (ygolohcysp esrever) _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
