Sendmail and MS Exchange

-leliel- · Post by **-leliel-** » Thu Aug 14, 2003 2:06 pm

Hi,

I want to send mail with sendmail through a MS Exchange server (relay).

How do I login to this server using sendmail??

ehlo output of the exchange server:

250-ex.domain.com Hello [172.28.0.1]
250-XEXCH50
250-HELP
250-ETRN
250-DSN
250-SIZE 8192000
250-AUTH LOGIN
250 AUTH=LOGIN

Thanks a lot.

kashani · Post by **kashani** » Thu Aug 14, 2003 11:29 pm

Sendmail is an MTA much like Exchange itself. I suppose you could hack something together to make Sendmail login into Exchange, but I'm not sure that you would need to. You would need to tell Exchange that the IP address of your Sendmail machine is allowed to relay mail and then configure Sendmail to use Exchange as the relay.

Unfortunately, I've usually done it the other way around for scalibitlity reasons.

kashani

-leliel- · Post by **-leliel-** » Fri Aug 15, 2003 5:45 am

Well, I have to write a script to automatically send mails.

Code: Select all

/usr/sbin/sendmail -t -n << EOF
From:blubb
To:abc
Subject:test
abcde
EOF

This mail should be relayed through the exchange server.

Any Ideas?

I found a howto, but the mail will not be send cause sendmail couldn't find the dns hostname of the exchange server.

Thanks a lot

Liathus · Post by **Liathus** » Fri Aug 15, 2003 5:56 am

You will need to turn smtp relaying on for the IP address of the machine running sendmail.
After that you will need to tell sendmail to use the exchange server to deliver messages instead of doing so directly. You can do this in sendmail.cf or if you are scared of that file like me you could use webmin :)

-leliel- · Post by **-leliel-** » Fri Aug 15, 2003 7:07 am

this is a part of the logfile:

Aug 14 18:08:10 proxy2 sendmail[9337]: alias database /etc/aliases rebuilt by root
Aug 14 18:08:10 proxy2 sendmail[9337]: /etc/aliases: 40 aliases, longest 10 bytes, 395 bytes total
Aug 14 18:08:10 proxy2 sendmail[9350]: starting daemon (8.11.6): SMTP+queueing@01:00:00
Aug 14 18:08:32 proxy2 sendmail[9354]: h7EG8Tu09354: from=root, size=6, class=0, nrcpts=1, msgid=<200308141608.h7EG8Tu09354@localhost.localdomain>, relay=root@localhost
Aug 14 18:08:32 proxy2 sendmail[9354]: h7EG8Tu09354: to=test@domain.com, ctladdr=root (0/0), delay=00:00:03, xdelay=00:00:00, mailer=esmtp, pri=30006, relay=172.20.1.78, dsn=5.1.2, stat=Host unknown (Name server: 172.20.1.78: host not found)

I also changed /etc/nsswitch.conf:

hosts: files [NOTFOUND=continue] dns

to search the /etc/hosts firstly but it's not working at all.

kashani · Post by **kashani** » Fri Aug 15, 2003 4:47 pm

Looks like DNS resoltuion problems. Add an entry for the 172.x.x.x machine into your /etc/hosts and then change your smart relay to the host name you've entered.

kashani

thorne · Post by **thorne** » Wed May 12, 2004 9:43 pm

-leliel- wrote:I found a howto, but the mail will not be send cause sendmail couldn't find the dns hostname of the exchange server.

Hi... could you post a link to this how-to? I'm trying to setup bugzilla to go through an exchange server, but it only works with sendmail (or so I have read,) so I would like to know how to do this.

Thanks.