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Old 05-02-2010, 01:21 AM
"Wang, Mary Y"
Default Sendmail Configuration Problem - 550 5.1.1 - User unknown Problem

I'm having this Sendmail configuration problem and stuck. I've been doing googling/reading posts and none of the solutions matched my problem.
I'm doing some testing, and have been getting this 550 5.1.1 ....User unknown error when I send the email to my company's email address. When I send it to an external email address, such as yahoo, the message delivered successfully. Of course, I'm doing the configuration behind a firewall. I'm using a relay too, and I did declare the relay host in 'SMART_HOST' in the sendmail.mc file and have also recompiled it to produce the sendmail.cf. I also restarted the sendmail service.
telnet ana.boeing.com 25
Connected to ana.boeing.com (
Escape character is '^]'.
220 ana.boeing.com ESMTP Sendmail; Sat, 1 May 2010 16:39:06 -0700
helo ana.boeing.com
250 ana.boeing.com Hello ana.boeing.com [], pleased to meet you
mail from:root@ana.boeing.com
250 2.1.0 root@ana.boeing.com... Sender ok
rcpt to:mary.y.wang@boeing.com
550 5.1.1 mary.y.wang@boeing.com... User unknown

Any ideas? I'm running on Sendmail 8.12.11


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