Re: Block mail servers with no reverse dns entries

2015-06-23 Thread Viktor Dukhovni
On Tue, Jun 23, 2015 at 05:41:40PM -0700, Terry Barnum wrote: > > This is more a matter of policy than law. I prefer to turn some > > additional tests when check_client_access matches "unknown". > > > > Wietse > > Can you show your additional tests? > > let me add my thanks to you Wietse fo

Re: Block mail servers with no reverse dns entries

2015-06-23 Thread Terry Barnum
> On Jun 18, 2015, at 3:51 AM, Wietse Venema wrote: > > Michael Peter: >> Hi, >> >> How can force postfix to reject emails from mail servers which doesn't >> have a reverse dns entry ? > > You can use reject_unknown_reverse_client_hostname or > reject_unknown_client_hostname, depending on the

Re: Block mail servers with no reverse dns entries

2015-06-18 Thread Wietse Venema
Michael Peter: > Hi, > > How can force postfix to reject emails from mail servers which doesn't > have a reverse dns entry ? You can use reject_unknown_reverse_client_hostname or reject_unknown_client_hostname, depending on the appropriate definition of "unknown". Note that the outcome of these d

Block mail servers with no reverse dns entries

2015-06-18 Thread Michael Peter
Hi, How can force postfix to reject emails from mail servers which doesn't have a reverse dns entry ? and is this correct thing to do according to the standards? Thank you. Michael Peter