On Monday 17 July 2006 12:58, ankush grover wrote:

On 7/17/06, Karanbir Singh mail-lists@karan.org wrote:

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ankush grover wrote:

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hey friends,

I have installed sendmail or it would rather say it comes default with the centos. I am using Centos4.0

sendmail with centos 4.0 has security issues, you should upgrade that machine right away.

also, why are you using centos 4.0 in the first place ? what keeps you from upgrading that machine ?

hey,

Thanks for the reply. This is just the testing machine and the mail server will be either on the latest version of Centos or Fedora. But first I need to understand the concepts and configuration of Sendmail.

Thanks & Regards

Ankush Grover

Go for Centos if oyu want to build a server as fedora is a test bed ..

and why learn sendmail when postfix is 80 times easier.

Later

On Mon, 2006-07-17 at 22:28 +0530, ankush grover wrote:

On 7/17/06, Karanbir Singh mail-lists@karan.org wrote: ankush grover wrote: ><snip>

Thanks for the reply. This is just the testing machine and the mail server will be either on the latest version of Centos or Fedora. But first I need to understand the concepts and configuration of Sendmail.

A friendly suggestion then. Read first. Sendmail is (overly) complex because it can do so much. For simpler tasks, one could say it is overkill. If your 25 users are waiting for you to do something, better go the fast way first and learn later.

Are you familiar with the m4 macro language? If not... no problem. When I first worked Sendmail, we used it directly. TG I never had to learn that much. But I mention it so you can go to /etc/mail and look at the *.cf files generated from the *.mc files. And you see the commonly(?) touched things. There are *tons* (maybe metric tons) of other things you don't see that have an effect. Get hold of a good Sendmail admin guide.

Thanks & Regards

Ankush Grover

<snip sig stuff>

BTW, as suggested by another, last time I set up mail in my LAN previous incarnation, I did postfix. Easy, reliable, flexible. I second the recommendation until you have time to become more familiar with Sendmail.

GL to you.

Mail coming from your ISP for domain exampl1.com isn't rejected? Can it be that you fetchmail the mail? I ask because I bet you did not configure example1.com to be in class{w} (means treated to be local). Do so by adding that domain to /etc/mail/local-host-names. That is a plaintext flat file. Sendmail daemon restart is necessary.

echo '$=w' | /usr/lib/sendmail -bt ADDRESS TEST MODE (ruleset 3 NOT automatically invoked) Enter <ruleset> <address>

cluster1

[192.168.1.125] localhost.localdomain localhost example1.com

the example1.com is there.

The logs (/var/log/maillog) shows

Jul 18 15:38:00 cluster1 sendmail[6459]: k6IA80Op006455: to=< ank@example1.com>, ctladdr=ank@example1.com (512/513), delay=00:00:00, xdelay=00:00:00, mailer=local, pri=30776, dsn=2.0.0, stat=Sent

But the user ank is not able to receive the mails.

/etc/mail/local-host-names contains these entries

localhost localhost.localdomain example1.com

Second problem I am facing is that how do I configured sendmail to the

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send the credentials of each user to the ISP account. For example if user1 wants to send the mail to the Internet the sendmail server should connect to ther ISP server with this user credentails (username and password ) and if user2 wants to send the mail to ther Internet then the sendmail should connect to the ISP server with the user2 credentails ( username and password).

http://www.sendmail.org/~ca/email/sm-812.html#812AUTH

It isn't possible to define multiple users for a single relay host target. (With Postfix you would require release 2.3)

For different relay selections based on the sender there is

http://anfi.homeunix.net/sendmail/smarttab.html

I will go through it.

Thanks & Regards

Ankush Grover