Hi, I have an MX server which redirect all traffic to specific "domain
related" mail servers i.e. 3 servers (antivirus/antispam). These three
servers are configured so that emails at the end of the filter engine are
managed by sendmail (8.12). These servers send emails to other account
servers.
I want to change these 3 servers configuration so that having messages like
user unknown and other stuff like that, sendmail sends these errors to a
specific outbound server while incoming email is sent still to the account
servers.
If there's not a specific parameter, I will use DS and Mailertable in
combination so that DS will be set as "DSoutbound.server" and Mailertable
filled with all internal domain. Is it ok?

Bye,
Leo.

In comp.mail.sendmail Bumozz <leobq.box [at] gmail.com>:
> Hi, I have an MX server which redirect all traffic to specific "domain
> related" mail servers i.e. 3 servers (antivirus/antispam). These three
> servers are configured so that emails at the end of the filter engine are
> managed by sendmail (8.12). These servers send emails to other account
> servers.
[..]

Yep, sounds good unless you set this all up in DNS, then you
wouldn't need to use mailertable. Though it is usually just fine.

However, you generate quite some back-scatter if you can't check
for existent user right where you accept incoming mail, this can
be iirc done through ldap from sendmail against M$-Exchange and
alike. So you upset others with your bounces, as spam addresses
are usually faked. It is much harder to fight against a real MTA
from an non suspicious IP then against the usual ratware.

In addition to anti-spam, you lose almost any powers against spam
if you are incapable of running it during SMTP time right where
you accept it from the internet, on your MX machine.

--
Michael Heiming (X-PGP-Sig > GPG-Key ID: EDD27B94)
mail: echo zvpunry [at] urvzvat.qr | perl -pe 'y/a-z/n-za-m/'
#bofh excuse 326: We need a licensed electrician to replace
the light bulbs in the computer room.