Hi,
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.
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telnet ana.boeing.com 25
Trying 134.51.151.114...
Connected to ana.boeing.com (134.51.151.114).
Escape character is '^]'.
220 ana.boeing.com ESMTP Sendmail 8.12.11.20060308/8.12.11; Sat, 1 May 2010 16:39:06 -0700
helo ana.boeing.com
250 ana.boeing.com Hello ana.boeing.com [134.51.151.114], pleased to meet you
mail from:root@xxxxxxxxxxxxxx
250 2.1.0 root@xxxxxxxxxxxxxxxxx Sender ok
rcpt to:mary.y.wang@xxxxxxxxxx
550 5.1.1 mary.y.wang@xxxxxxxxxxxxx User unknown
Any ideas? I'm running on Sendmail 8.12.11
Mary
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