On Sat, May 01, 2010 at 08:06:05PM -0700, Wang, Mary Y (mary.y.wang at boeing.com) wrote: > It's working now. I just commented out some of the FEATURE lines in sendmail.mc file. > Mary I hope you know what you are doing coz commenting out "feature lines" (randomly) "just" to get sendmail "working" is not a good idea ... for example I would not comment out these: FEATURE(delay_checks,friend) FEATURE(`dnsbl',`zen.spamhaus.org',`go away spammer') FEATURE(`no_default_msa',`dnl')dnl FEATURE(`smrsh',`/usr/sbin/smrsh')dnl FEATURE(`virtusertable',`hash /etc/mail/virtusertable')dnl FEATURE(redirect)dnl FEATURE(always_add_domain) FEATURE(use_cw_file) FEATURE(use_ct_file) FEATURE(local_procmail,`',`procmail -t -Y -a $h -d $u')dnl FEATURE(`access_db',`hash -T<TMPF> /etc/mail/access.db')dnl FEATURE(`greet_pause',5000) FEATURE(blacklist_recipients) FEATURE(masquerade_envelope)dnl FEATURE(masquerade_entire_domain)dnl FEATURE(allmasquerade) But I comment out (and highly recommend that) these: dnl FEATURE(`accept_unresolvable_domains')dnl dnl FEATURE(`relay_based_on_MX')dnl So I assume the SMART_HOST is your ISP's mailserver? When you send an email "internally" what is the error in the sendmail maillog (as your mailserver becomes the recipient)? Jobst > > > _____________________________________________ > From: Wang, Mary Y > Sent: Saturday, May 01, 2010 6:21 PM > To: 'centos at centos.org' > Subject: Sendmail Configuration Problem - 550 5.1.1 - User unknown Problem > > 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 > > Mary > > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos -- The future isn't what it used to be (it never was). | |0| | Jobst Schmalenbach, jobst at barrett.com.au, General Manager | | |0| Barrett Consulting Group P/L & The Meditation Room P/L |0|0|0| +61 3 9532 7677, POBox 277, Caulfield South, 3162, Australia