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08.27.2007 at 01:14PM PDT, ID: 22789978
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Linux (Fedora Core 7) >Apache > Sendmail > Exchange 2k7

Asked by UBIFCU in SendMail Email Server, Exchange Email Server, Simple Mail Transfer Protocol (SMTP)

Tags: fedora, 7, sendmail, exchange

I'm trying to get sendmail to forward to an internal mail server behind a firewall (both exchange and sendmail are behind the firewall, same network). The perl script sends to external address just fine, however, when trying to send to the internal mail server, I get the following bounced mail error codes:

Remote-MTA: DNS; [127.0.0.1]
Diagnostic-Code: SMTP; 550 5.1.1 <tech@ubifcu.com>... User unknown

I have mX records pointed at my mail server internally, but the e-mail keeps bouncing as if it thinks the Linux server is ubifcu.com

I do have my exchange server setup as the smarthost in sendmail.cf, and I can create an SMTP session via telnet.

Can anyone shed some light on this?Start Free Trial
[+][-]08.27.2007 at 11:26PM PDT, ID: 19780725

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Zones: SendMail Email Server, Exchange Email Server, Simple Mail Transfer Protocol (SMTP)
Tags: fedora, 7, sendmail, exchange
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Solution Provided By: Blaz
Participating Experts: 1
Solution Grade: A
 
 
[+][-]08.28.2007 at 05:10AM PDT, ID: 19782131

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[+][-]08.28.2007 at 06:18AM PDT, ID: 19782651

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