Hey everyone, I'm finally getting back to working on the mail relay problem I was having a couple weeks ago. To recap: I'd like to have a simple email server (mail.buffalo.k12.mn.us) sitting on our network that will simply relay mail sent from various servers (like our nagios server) out to the Internet, but with the return address domain set to our standard one (buffalo.k12.mn.us). I wouldn't even need this except that configuring our GroupWise system to do this has been a hassle, and I figured this would be a simpler solution. I've got it working internally. I can email any user on our GroupWise system from my user account on the server (Ubuntu 6.06 w/ postfix as the MTA). When I try to send a test message to my visi address I get the following in mail.log on the mail server: Jan 11 13:48:25 mail postfix/smtp[8221]: connect to smx.visi.com.redcondor.net[208.80.202.253]: server dropped connection without sending the initial SMTP greeting (port 25) Jan 11 13:48:25 mail postfix/smtp[8221]: 441041584AB: to=<wilson at visi.com >, relay=none, delay=0, status=deferred (connect to smx.visi.com.redcondor.net[208.80.202.253]: server dropped connection without sending the initial SMTP greeting) I called visi, and the tech said she wasn't even seeing the message hitting their server. She did say that there is no MX record listed for mail.bufffalo.k12.mn.us. Would that matter if this server is sending mail as buffalo.k12.mn.us? Perhaps visi is doing some reverse dns on the mail.buffalo.k12.mn.us IP and rejecting it? If anyone has a moment to look at my main.cf and master.cf configs below, I'd sure appreciate it. Or perhaps someone would be willing to look at their server logs as I try to send a test message? Here's my main.cf: --snip-- smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases #disable_dns_lookups = no masquerade_exceptions = root masquerade_classes = envelope_sender, header_sender, header_recipient myhostname = mail.buffalo.k12.mn.us masquerade_domains = buffalo.k12.mn.us mydestination = $myhostname, localhost.$mydomain mynetworks = 10.0.0.0/8 relayhost = --snip-- And here's my master.cf: --snip-- # # Postfix master process configuration file. For details on the format # of the file, see the Postfix master(5) manual page. # # = = ======================================================================== # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (yes) (never) (100) # = = ======================================================================== smtp inet n - - - - smtpd #submission inet n - - - - smtpd # -o smtpd_etrn_restrictions=reject # -o smtpd_client_restrictions=permit_sasl_authenticated,reject #smtps inet n - - - - smtpd # -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes #submission inet n - - - - smtpd # -o smtpd_etrn_restrictions=reject # -o smtpd_enforce_tls=yes -o smtpd_sasl_auth_enable=yes #628 inet n - - - - qmqpd pickup fifo n - - 60 1 pickup cleanup unix n - - - 0 cleanup qmgr fifo n - n 300 1 qmgr #qmgr fifo n - - 300 1 oqmgr tlsmgr unix - - - 1000? 1 tlsmgr rewrite unix - - - - - trivial-rewrite bounce unix - - - - 0 bounce defer unix - - - - 0 bounce trace unix - - - - 0 bounce verify unix - - - - 1 verify flush unix n - - 1000? 0 flush proxymap unix - - n - - proxymap smtp unix - - - - - smtp # When relaying mail as backup MX, disable fallback_relay to avoid MX loops relay unix - - - - - smtp -o fallback_relay= # -o smtp_helo_timeout=5 -o smtp_connect_timeout=5 showq unix n - - - - showq error unix - - - - - error discard unix - - - - - discard #local unix - n n - - local virtual unix - n n - - virtual lmtp unix - - - - - lmtp anvil unix - - - - 1 anvil scache unix - - - - 1 scache # # ==================================================================== # Interfaces to non-Postfix software. Be sure to examine the manual # pages of the non-Postfix software to find out what options it wants. # # Many of the following services use the Postfix pipe(8) delivery # agent. See the pipe(8) man page for information about ${recipient} # and other message envelope options. # ==================================================================== # # maildrop. See the Postfix MAILDROP_README file for details. # Also specify in main.cf: maildrop_destination_recipient_limit=1 # maildrop unix - n n - - pipe flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient} # # See the Postfix UUCP_README file for configuration details. # uucp unix - n n - - pipe flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient) # # Other external delivery methods. # ifmail unix - n n - - pipe flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient) bsmtp unix - n n - - pipe flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient scalemail-backend unix - n n - 2 pipe flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store $ {nexthop} ${user} ${extension} mailman unix - n n - - pipe flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user} --snip-- I'd appreciate any pointers on this. Thanks everybody. -Tim -- Tim Wilson, The Savvy Technologist Twin Cities, Minnesota, USA Educational technology guy, Linux and OS X fan, Grad. student, Daddy mailto: wilson at visi.com aim: tis270 blog and podcast: http://technosavvy.org