Postfix not sending incoming queue. Unable to send mail.

[xxthegonzxx]

Hi All,

My server gets stuck and is not able to send mail. It only happens over the weekends and I have to constantly restart (Service Postfix restart) in order for it to start sending again. I've searched forums but have not been able to find any solid answers. I would really appreciate your input please.

Here are some log errors when I run (cat/var/log/maillog | grep warning):

Nov 27 06:24:54 batch-ca4-02 postfix/cleanup[11491]: warning: timeout on cleanup socket while reading input attribute name
Nov 27 06:48:46 batch-ca4-02 postfix/cleanup[11491]: warning: 498D73E3003A: read timeout on cleanup socket

When I run (cat /var/log/maillog | grep error):

Nov 27 04:04:58 batch-ca4-02 postfix/smtpd[4618]: dict_eval: const error
Nov 27 04:04:58 batch-ca4-02 postfix/smtp[4619]: dict_eval: const error
Nov 27 07:11:10 batch-ca4-02 postfix/smtpd[11263]: dict_eval: const error
Nov 27 07:11:10 batch-ca4-02 postfix/smtpd[21990]: dict_eval: const error
Nov 27 08:02:03 batch-ca4-02 postfix/smtpd[26997]: dict_eval: const error
Nov 27 09:02:35 batch-ca4-02 postfix/smtpd[637]: dict_eval: const error
Nov 27 10:02:03 batch-ca4-02 postfix/smtpd[6404]: dict_eval: const error
Nov 27 11:02:26 batch-ca4-02 postfix/smtpd[12311]: dict_eval: const error
Nov 27 12:30:14 batch-ca4-02 postfix/smtpd[20688]: dict_eval: const error
Nov 27 12:30:39 batch-ca4-02 postfix/smtpd[20736]: dict_eval: const error
Nov 27 12:31:38 batch-ca4-02 postfix/smtpd[20834]: dict_eval: const error
Nov 27 13:02:03 batch-ca4-02 postfix/smtpd[24044]: dict_eval: const error

I know that all new mail entering the Postfix queue is written by the cleanup(8) service into the "incoming" queue. When I run (qshape -s incoming) I see that majority of emails are stuck in the incoming queue.

I also read that "If a server is being hammered from multiple directions, consider raising the in_flow_delay to 10 seconds, but only if the incoming queue is growing even while the active queue is not full and the trivial-rewrite service is using a fast transport lookup mechanism." I set the in_flow_delay to 10 seconds and restarted postfix to set it. Now I just have to wait to see if that will solve the issue.

Can anyone that's more experienced with this please tell me what's going on, as this is a little confusing? Thank you for your help and I can provide more info on request.

[xxthegonzxx]

Anyone out there experience this? Any solution or tips please?

[phoenix]

Originally Posted by xxthegonzxx

Here are some log errors when I run (cat/var/log/maillog | grep warning):

Nov 27 06:24:54 batch-ca4-02 postfix/cleanup[11491]: warning: timeout on cleanup socket while reading input attribute name
Nov 27 06:48:46 batch-ca4-02 postfix/cleanup[11491]: warning: 498D73E3003A: read timeout on cleanup socket

I would suggest the above highlighted text is the problem.

Originally Posted by xxthegonzxx

Any solution or tips please?

Take your pick: +"read timeout on cleanup socket" +postfix - Yahoo! Search Results

[xxthegonzxx]

Thank you pheonix. I searched yahoo and couldn't find a proper solution. Can you please be more specific as what the problem consist of? I'm still new to this.

Here is the output of my postconf -n

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
html_directory = no
in_flow_delay = 10s
inet_interfaces = localhost
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain, localhost
mydomain = usaepay.com
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES
relayhost = 192.168.x.x
sample_directory = /usr/share/doc/postfix-2.3.3/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
unknown_local_recipient_reject_code = 550

Also my master.cf:

# of the file, see the master(5) manual page (command: "man 5 master").
#
# ================================================== ========================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (yes) (never) (100)
# ================================================== ========================
smtp inet n - n - - smtpd -v
#submission inet n - n - - smtpd
# -o smtpd_enforce_tls=yes
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_client_restrictions=permit_sasl_authenticate d,reject
#smtps inet n - n - - smtpd
# -o smtpd_tls_wrappermode=yes
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_client_restrictions=permit_sasl_authenticate d,reject
#628 inet n - n - - qmqpd
pickup fifo n - n 60 1 pickup
cleanup unix n - n - 0 cleanup
qmgr fifo n - n 300 1 qmgr -v
#qmgr fifo n - n 300 1 oqmgr
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
smtp unix - - n - - smtp -v
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay unix - - n - - smtp
-o fallback_relay=
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - n - - showq
error unix - - n - - error
discard unix - - n - - discard
local unix - n n - - local -v
virtual unix - n n - - virtual -v
lmtp unix - - n - - lmtp -v
anvil unix - - n - 1 anvil
scache unix - - n - 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/local/bin/maildrop -d ${recipient}
#
# The Cyrus deliver program has changed incompatibly, multiple times.
#
old-cyrus unix - n n - - pipe
flags=R user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -m ${extension} ${user}
# Cyrus 2.1.5 (Amos Gouaux)
# Also specify in main.cf: cyrus_destination_recipient_limit=1
cyrus unix - n n - - pipe
user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -r ${sender} -m ${extension} ${user}
#
# See the Postfix UUCP_README file for configuration details.
#
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$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=foo argv=/usr/local/sbin/bsmtp -f $sender $nexthop $recipient

I also read that "if a server is being hammered from multiple directions, consider raising the in_flow_delay to 10 seconds, but only if the incoming queue is growing even while the active queue is not full and the trivial-rewrite service is using a fast transport lookup mechanism." I changed this to reflect 10 seconds but still nothing. I would really appreciate some help on this.