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
centos-bounces@centos.org <> scribbled on Tuesday, June 20, 2006 2:01 PM:
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
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Spammers will typically try to hit a lower priority MX with the assumption it is less secure...allowing them to get their spam through. Are the emails coming through your lower priority MX's junk or legitimate? Are all the MX's on the same network? Is it possible that MX1 is not accessible for one reason or another, but MX2 or MX3 are?
Mike
israel.garcia@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
On Tue, 2006-06-20 at 14:19 -0400, John Hinton wrote:
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?
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.
If you mean to check for a valid smtp recipient on a different machine before accepting for forwarding, it is relatively easy to do that with MimeDefang too - along with about any other virus or spam checks you'd like: http://www.mimedefang.org/.
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israel.garcia＠cimex.com.cu -
John Hinton -
Les Mikesell -
Mike Kercher