email without local mta daemon running

jag7720 · 07-18-2012, 12:26 PM

We have an exchange server that will accept connections from our linux servers and will send email from them.

I am able to telnet to the exchange server on port 25 and do a helo test and send an emial. Also, we have a java based app on the linux server that can send mail successfully and the only config for it is the IP of the exchange server.

I'd like to write some scripts that will send me an email when what I need to know about happens.

I can't run sendmail daemon or any other MTA daemon for that matter on the linux servers.

Is there a way that I can send an email from my linux servers from the cli or script that will specify the exchange server as the relay?

Oh, and I am stuck using mail or mailx. I can't install any other software.

I've tried the "-S smtp=xxx.xxx.xxx.xxx" in mailx as I have seen suggested but it doesn't like the "-S".

thanks for the help

Kustom42 · 07-18-2012, 03:14 PM

Check out.. http://motersho.com/blog/index.php/2...p-device-file/

You can also, if you are able to, install an MTA like qmail and smart host the email messages to the exchange server for actual delivery. qmail would only handle the email creation and queue management on the linux server.

jag7720 · 07-18-2012, 03:22 PM

Thanks for the reply. I am able to do the first part of that page manually... but the rest of it seems overly complicated to accomplish a simple

Code:

mailx  -s "test from smtp #1" user@domain.com

There has to be a setting somewhere to tell sendmail where to relay to

lithos · 07-18-2012, 06:19 PM

Hi,

I don't really know how or what, I'm almost sure that where is "mail" command there is "sendmail" behind it,
si I did search for some "sendmail relay"
and it points out some of possible examples:
- Configure sendmail for SMTP relay with your ISP
- configure sendmail to relay mail to exchange server
- Using Sendmail to relay all mail to my Exchange Server
- SENDMAIL as an SMTP RELAY SERVER that can send email to internet
- How To Relay Email On A Postfix Server

I hope something will be helpful

chrism01 · 07-18-2012, 06:38 PM

Quote:

I can't run sendmail daemon or any other MTA daemon for that matter on the linux servers.

I'd be amazed if there isn't already an MTA like sendmail running.
Its pretty much the std install to have one so that the system can talk to itself eg if cron has an issue, it would try to email the local user and/or root.
Of course, it may(!) only be able to msg itself ie no outgoing traffic allowed, but that's just a cfg setting.

You can check using these cmds (at least for sendmail on RHEL/Centos)

Code:

tail /var/log/maillog

mailq -Ac

mailq -Lq

Here's a way to cfg it to use a specific eg Exchange server, without using DNS http://www.walkernews.net/2010/12/31...x-without-dns/