Why is sendmail giving me this 550 error?

[James Long]

Sorry for tihs being marginally off-topic, but sendmail
doesn't have a mailing list anymore (that I can tell), 
just a newsgroup, and I have no effective Usenet access.

I'm trying to subscribe to the smokeping mailing list.

Why am I getting this 550 error?  If I telnet directly to the
MX for lists.oetiker.ch and perform a manual ehlo/mail from/rcpt to
I get a 450 greylisting response, which makes much more sense
than this 550/503 failure.

Thank you!

Jim


Mar 23 18:04:10 mx sendmail[40229]: l2O14A5b040229: from=user at example.com, size=327, class=0, nrcpts=1, msgid=<20070324010410.GB39196 at example.com>, relay=user at localhost
Mar 23 18:04:10 mx sm-mta[40230]: NOQUEUE: connect from localhost [127.0.0.1]
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: Milter (spamassassin): init success to negotiate
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: Milter: connect to filters
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: milter=spamassassin, action=connect, accepted
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 220 example.com ESMTP Sendmail 8.13.8/8.13.8; Fri, 23 Mar 2007 18:04:10 -0700 (PDT)
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: <-- EHLO example.com
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 250-example.com Hello localhost [127.0.0.1], pleased to meet you
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 250-ENHANCEDSTATUSCODES
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 250-PIPELINING
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 250-8BITMIME
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 250-SIZE
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 250-DSN
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 250-ETRN
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 250-DELIVERBY
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 250 HELP
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: <-- MAIL From:<user at example.com> SIZE=327
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: Milter: senders: <user at example.com>
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 250 2.1.0 <user at example.com>... Sender ok
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: <-- RCPT To:<smokeping-users-request at lists.oetiker.ch>
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 550 5.2.1 <smokeping-users-request at lists.oetiker.ch>... Mailbox disabled for this recipient
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: ruleset=check_rcpt, arg1=<smokeping-users-request at lists.oetiker.ch>, relay=localhost [127.0.0.1], reject=550 5.2.1 <smokeping-users-request at lists.oetiker.ch>... Mailbox disabled for this recipient
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: <-- DATA
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 503 5.0.0 Need RCPT (recipient)
Mar 23 18:04:10 mx sendmail[40229]: l2O14A5b040229: to=smokeping-users-request at lists.oetiker.ch, ctladdr=user at example.com (1001/1001), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30327, relay=[127.0.0.1] [127.0.0.1], dsn=5.2.1, stat=User unknown
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: <-- RSET
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: --- 250 2.0.0 Reset state
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5q040230: from=<user at example.com>, size=327, class=0, nrcpts=0, proto=ESMTP, daemon=IPv4, relay=localhost [127.0.0.1]
Mar 23 18:04:10 mx sendmail[40229]: l2O14A5b040229: l2O14A5c040229: DSN: User unknown
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5r040230: <-- RSET
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5r040230: --- 250 2.0.0 Reset state
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5s040230: <-- MAIL From:<> SIZE=1351
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5s040230: Milter: senders: <>
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5s040230: --- 250 2.1.0 <>... Sender ok
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5s040230: <-- RCPT To:<user at example.com>
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5s040230: Milter: rcpts: <user at example.com>
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5s040230: --- 250 2.1.5 <user at example.com>... Recipient ok
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5s040230: <-- DATA
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5s040230: --- 354 Enter mail, end with "." on a line by itself
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5s040230: from=<>, size=2514, class=0, nrcpts=1, msgid=<200703240104.l2O14A5c040229 at example.com>, proto=ESMTP, daemon=IPv4, relay=localhost [127.0.0.1]
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5s040230: Milter accept: message
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5s040230: --- 250 2.0.0 l2O14A5s040230 Message accepted for delivery
Mar 23 18:04:10 mx sendmail[40229]: l2O14A5c040229: to=user at example.com, delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=31351, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (l2O14A5s040230 Message accepted for delivery)
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5t040230: <-- QUIT
Mar 23 18:04:10 mx sm-mta[40230]: l2O14A5t040230: --- 221 2.0.0 example.com closing connection