On Sat, May 01, 2010 at 08:06:05PM -0700, Wang, Mary Y (mary.y.wang@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

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From: Wang, Mary Y Sent: Saturday, May 01, 2010 6:21 PM To: 'centos@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.

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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@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

Mary

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