> Am 17.03.2016 um 14:53 schrieb Thomas Schulz: >> This is not a BIND question but I hope people here will know the answer >> We are switching service providers and I understand that many email >> SPAM prevention systems insist on the reverse DNS matching the forward >> DNS. If I have two A records for our mail server and the reverse record >> matches one of them, will that be good enough. Or will the fact that >> the other A record does not match cause trouble > > when you have two A-recods then you have two IP's > each of them should have a PTR with *only* the name of the A-record > and in a good setup "smtp_helo_name" matchs too
Thanks to everyone for their answers. In switching service providers we have arranged for both providers to be active at the same time for a few weeks. The old provider has reverse DNS set up but the new provider does not yet have that set up. I was thinking of allowing incomming email from both by having two A records but alowing outgoing email only through the old provider that has the working reverse DNS. When the new provider also has reverse DNS set up then I can switch outgoing email and close down the old connection. I turns out that it is harder than I thought to allow incomming connections from both providers at the same time, so I may not do that after all. Tom Schulz Applied Dynamics Intl. sch...@adi.com _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
