<div>
Hi<br />
<br />
have you enable this line in sendmail.mc <br />
<br />
define(`SMART_HOST', `smtp.your.provider')dnl<br />
<br />
instead of smtp.your.provider it wouldbe the name of our exchange server<br />
<br />
which could be exchange.yourdomin.com<br />
<br />
and as far i know, <br />
in exchage you need to allow Pc to realy email via this server<br />
so have you allowed this linuc pc to realy via exchange server ??
</div>


<div>
I have the SMART_HOST defined. &nbsp;It's the first thing I tried. &nbsp;As I said, the exchange side is fine - I can relay through it FROM THE PBX if I do it manually. &nbsp;The only problem is that sendmail can't see the exchange server as its relay. If I can get sendmail to relay properly, I'll be fine.
</div>


<div>
what about sendmail.cf file<br />
<br />
open it, and look for work smart host<br />
<br />
to search quicky <br />
<br />
vi sendmail.cf<br />
<br />
then tye<br />
/smart<br />
<br />
press enter<br />
it will show you any line which as word smart<br />
press n to go to next line<br />
<br />
just check in sendmai.cf file it has enabled aswell
</div>


<div>
more specifiqly in sendmail.cf file<br />
<br />
<br />
these 2 line<br />
<br />
# &quot;Smart&quot; relay host (may be null)<br />
DSsbs.yourdomain.local<br />
<br />
DMyourdomain.com
</div>


<div>
due to midnight i would be off<br />
<br />
if your sendmail.cf file has those 2 options then i am not seeing why sendmail will not realy email via exchange..<br />
<br />
if still you have problem<br />
<br />
i willl seee tomorrow
</div>


<div>
sendmail.cf is created from sendmail.mc and cannot be directly edited. &nbsp;I am looking for help with the configuration of sendmail.mc
</div>


<div>
Good morning, <br />
Who said, Sendmail.cf cant be modifyed directly ??<br />
<br />
have you checked in sendmail.cf for those references ??<br />

</div>


<div>
HI,<br />
is there any way if you can give me little bit of information about routing loop in sendmail.mc file ??<br />
<br />
which option you are saying ??<br />
<br />
it would be helpfull for me aswell
</div>


<div>
<div class="content wysiwyg-content">
I've been banging my head against this all afternoon. &nbsp;I have a pbx on my LAN that needs to send mail. &nbsp;Unitl now, I have only been sending to users on my domain which has been working. Now, however, I need it to be able to send mail (failure events, for example) to outside addresses. &nbsp; I have my exchange (2007) configured with a nice new connector that listens on port 2525 and if I send outside mail through it via telnet (from the pbx) by using manual smtp commands, all is well. &nbsp;I just can't get sendmail to see it as a relay. &nbsp;It thinks it's relaying, but it always relays to 'localhost' which then fails because the pbx can't authenticate with the ISP. &nbsp;I have been through the forum atricles and I have tried all manner of specifying HOSTS and RELAYs in sendmail.mc but I must be missing something. &nbsp;I am make-ing a new /etc/mail and restarting sendmail each time. &nbsp;resolv.conf and hosts are correct - everything else is fine. &nbsp;Can somebody send a link to some directions for this - or help me through it? &nbsp;Thanks
</div>
</div>


I've been banging my head against this all afternoon.  I have a pbx on my LAN that needs to send mail.  Unitl now, I have only been sending to users on my domain which has been working. Now, however, I need it to be able to send mail (failure events, for example) to outside addresses.   I have my exchange (2007) configured with a nice new connector that listens on port 2525 and if I send outside mail through it via telnet (from the pbx) by using manual smtp commands, all is well.  I just can't get sendmail to see it as a relay.  It thinks it's relaying, but it always relays to 'localhost' which then fails because the pbx can't authenticate with the ISP.  I have been through the forum atricles and I have tried all manner of specifying HOSTS and RELAYs in sendmail.mc but I must be missing something.  I am make-ing a new /etc/mail and restarting sendmail each time.  resolv.conf and hosts are correct - everything else is fine.  Can somebody send a link to some directions for this - or help me through it?  Thanks

linux mail - can't configure sendmail to relay through local exchange server

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.

Email Servers

The variety of Linux distributions creates myriad issues relating to configuration and operations when computers are networked, not the least of which is the use of various network management applications, some of which are included with specific distributions, while others are standalone applications.

Linux Networking

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.