Wang, Mary Y wrote: > 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. > ---------------------------------------------------------------------------------------------------------------------------------------------------- > 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 at ana.boeing.com > 250 2.1.0 root at ana.boeing.com... Sender ok > rcpt to:mary.y.wang at boeing.com > 550 5.1.1 mary.y.wang at boeing.com... User unknown > > Any ideas? I'm running on Sendmail 8.12.11 > Is ana.boeing.com your machine, the relay, or the target MX receiver? Whatever it is, it thinks it should be able to deliver mail to boeing.com locally, but doesn't have a mary.y.wang user or alias. -- Les Mikesell lesmikesell at gmail.com