Hello list,
I am attempting to build a basic postfix setup that is able to send mail to
the internet. Receiving email is not a priority.
I've verified that this basic setup DOES work on an Amazon EC2 instance and
can be used to send email to anyplace it would like. However when I transfer
the config (main.cf and master.cf) to our work network the messages are
deferred and rejected by any mail server it encounters. I'd like very much to
understand why this is happening and to get this config to work on our local
network.
If I perform a telnet mail test on my local network the message is rejected
and deferred no matter what mail server it tries to communicate with:
[monitor03:root:/etc/postfix]#telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 monitor03.localdomain ESMTP Postfix
HELO monitor03
250 monitor03.localdomain
MAIL FROM: <mail-sen...@sending-domain.com>
250 2.1.0 Ok
RCPT TO: <mail-recei...@receiving-domain.com>
250 2.1.5 Ok
DATA
354 End data with <CR><LF>.<CR><LF>
Subject: test message
test test test
.
250 2.0.0 Ok: queued as E45C2136357
quit
221 2.0.0 Bye
Connection closed by foreign host.
This is what happens in the mail log when this test is performed:
Nov 17 16:25:39 monitor03 postfix/smtp[26004]: E45C2136357:
to=<mail-recei...@receiving-domain.com>, relay=none, delay=4755,
delays=4755/0.02/0.05/0, dsn=4.4.1, status=deferred (connect to
alt4.gmail-smtp-in.l.google.com[74.125.43.27]:25: Connection refused)
If I perform a telnet test from the cloud instance the message is sent and
received:
[root@cloud postfix]# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
220 cloud.localdomain ESMTP Postfix
HELO cloud
250 cloud.localdomain
MAIL FROM: <send-u...@send-domain.com>
250 2.1.0 Ok
RCPT TO: <receive-u...@receive-domain.com>
250 2.1.5 Ok
DATA
354 End data with <CR><LF>.<CR><LF>
Subject: test message
test test test
.
250 2.0.0 Ok: queued as 99FBC89E0
quit
221 2.0.0 Bye
Connection closed by foreign host.
This is what that session looks like in the mail log:
Nov 17 14:57:53 ip-10-125-10-29 postfix/qmgr[20746]: 99FBC89E0:
from=<send-u...@send-domain.com>, size=373, nrcpt=1 (queue active)
Nov 17 14:57:54 ip-10-125-10-29 postfix/smtp[3794]: 99FBC89E0:
to=<receive-u...@receive-domain.com>,
relay=bleachers2.mlb.com[66.192.34.20]:25, delay=26, delays=25/0.01/0.52/0.05,
dsn=2.0.0, status=sent (250 ok: Message 71193152 accepted)
Nov 17 14:57:54 ip-10-125-10-29 postfix/qmgr[20746]: 99FBC89E0: removed
Here are the the settings from the config which is shared by the working and
and non working environment:
main.cf:
myorigin = $mydomain
proxy_interfaces = 10.40.27.251 ## <-- the ip address of the problem server
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain,
unknown_local_recipient_reject_code = 550
mynetworks_style = subnet
relay_domains = $mydestination
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
ddd $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
setgid_group = postdrop
alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
And these are the contents of the master.cf file
# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (yes) (never) (100)
# ==========================================================================
smtp inet n - n - - smtpd
pickup fifo n - n 60 1 pickup
cleanup unix n - n - 0 cleanup
qmgr fifo n - n 300 1 qmgr
tlsmgr unix - - n 1000? 1 tlsmgr
rewrite unix - - n - - trivial-rewrite
bounce unix - - n - 0 bounce
defer unix - - n - 0 bounce
trace unix - - n - 0 bounce
verify unix - - n - 1 verify
flush unix n - n 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - n - - smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay unix - - n - - smtp
-o smtp_fallback_relay=
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - n - - showq
error unix - - n - - error
retry unix - - n - - error
discard unix - - n - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - n - - lmtp
anvil unix - - n - 1 anvil
scache unix - - n - 1 scache
#
I am quite sure that there is some setting (perhaps in main.cf) that needs to
be customized for this network. However I would greatly appreciate a suggestion
as to which setting would need to be altered between the two environments.
Thanks in advance!
Tim
