israel.garcia at cimex.com.cu wrote: > I've installed bind on centos 4.3.. This is a part of my config file: > > example.com. IN MX 10 mail.example.com. > example.com. IN MX 15 mail1.example.com. > example.com. IN MX 20 mail2.example.com. > > mail.example.com. IN A x.x.x.x > mail1.example.com. IN A x.x.x.x > mail2.example.com. IN A x.x.x.x > > > Every seems to be fine, but I'm constantly receiving messages in my 3 MX > servers, even if mail.example.com (the less MX record) is available > waiting for connections from outside... Why if my less mx record server > is available the others servers are constantly receiving messages for my > domain? > > Thanks for your time > Israel > There is a sendmail milter available for dealing with this. Basically, it can tell the backup mailservers to look for the primary before receiving mail. This is pretty much a must if you're going to do any volume of reliable email service. It also can look ahead for a real user before receiving mail on a backup system. The milter is called milter-ahead. http://www.milter.info/sendmail/milter-ahead/ It does cost a bit... for commercial use.. or is free for individual use. John Hinton