Mdthbs

My postfix service cannot start.
Here is message:

Job for postfix.service failed. See 'systemctl status postfix.service' and 'journalctl -xn' for details.

And here is service status:

postfix.service - Postfix Mail Transport Agent

  Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled)

  Active: failed (Result: timeout) since Wed 2015-11-18 16:58:32 ICT; 6min ago

  Process: 40961 ExecStart=/usr/sbin/postfix start (code=killed, signal=TERM)

  Process: 40957 ExecStartPre=/usr/libexec/postfix/chroot-update (code=exited, status=0/SUCCESS)

  Process: 40953 ExecStartPre=/usr/libexec/postfix/aliasesdb (code=exited, status=0/SUCCESS)



Nov 18 16:58:32 cpanel.redsand.vn systemd[1]: postfix.service operation timed out. Terminating.

Nov 18 16:58:32 cpanel.redsand.vn systemd[1]: Failed to start Postfix Mail Transport Agent.

Nov 18 16:58:32 cpanel.redsand.vn systemd[1]: Unit postfix.service entered failed state.

And here is my config:

alias_database = hash:/etc/aliases

alias_maps = hash:/etc/aliases

broken_sasl_auth_clients = yes

command_directory = /usr/sbin

config_directory = /etc/postfix

daemon_directory = /usr/libexec/postfix

data_directory = /var/lib/postfix

debug_peer_level = 2

debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin xxgdb $daemon_directory/$process_name $process_id & sleep 5

delay_warning_time = 4

disable_vrfy_command = yes

dovecot_destination_recipient_limit = 1

html_directory = no

inet_interfaces = all

mail_owner = postfix

mailq_path = /usr/bin/mailq.postfix

manpage_directory = /usr/share/man

message_size_limit = 20480000

mydestination = localhost.$mydomain, localhost, $mydomain

mydomain = cpanel.redsand.vn

myhostname = cpanel.redsand.vn

mynetworks = 127.0.0.1, 113.160.170.38

newaliases_path = /usr/bin/newaliases.postfix

queue_directory = /var/spool/postfix

readme_directory = /usr/share/doc/postfix-2.2.2/README_FILES

recipient_delimiter = +

relay_domains = proxy:mysql:/etc/sentora/configs/postfix/mysql-relay_domains_maps.cf

sample_directory = /usr/share/doc/postfix-2.2.2/samples

sendmail_path = /usr/sbin/sendmail.postfix

setgid_group = postdrop

smtp_use_tls = no

smtpd_banner = $myhostname ESMTP

smtpd_client_restrictions =

smtpd_data_restrictions = reject_unauth_pipelining

smtpd_helo_required = yes

smtpd_helo_restrictions =

smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_recipient_domain

smtpd_sasl_auth_enable = yes

smtpd_sasl_local_domain = $myhostname

smtpd_sasl_path = private/auth

smtpd_sasl_security_options = noanonymous

smtpd_sasl_type = dovecot

smtpd_sender_restrictions =

smtpd_use_tls = no

soft_bounce = yes

unknown_local_recipient_reject_code = 550

virtual_alias_maps = proxy:mysql:/etc/sentora/configs/postfix/mysql-virtual_alias_maps.cf, regexp:/etc/sentora/configs/postfix/virtual_regexp

virtual_gid_maps = static:12

virtual_mailbox_base = /var/sentora/vmail

virtual_mailbox_domains = proxy:mysql:/etc/sentora/configs/postfix/mysql-virtual_domains_maps.cf

virtual_mailbox_maps = proxy:mysql:/etc/sentora/configs/postfix/mysql-virtual_mailbox_maps.cf

virtual_minimum_uid = 991

virtual_transport = dovecot

virtual_uid_maps = static:991

Please help me solvethis problem, i dont know how to fix it.
Many thanks.

I have had the same problem, using configuration that was imported from a previous machine.

Here is how I solved this issue:

$ sudo rm -v /var/lib/postfix/master.lock

$ sudo systemctl start postfix

In my case there were also issues with a postfix process being left from previous attempts, here is the solution:

-- check that postfix is not running:

$ ps faxu | grep -i [p]ostfix

root     12854  0.0  0.2  92004  2236 ?        Ss   07:23   0:00 /usr/libexec/postfix/master -w

postfix  12855  0.0  0.4  98320  4088 ?        S    07:23   0:00  _ pickup -l -t fifo -u

postfix  12856  0.0  0.4  98388  4128 ?        S    07:23   0:00  _ qmgr -l -t fifo -u

postfix  12872  0.0  0.4  98332  4672 ?        S    07:29   0:00  _ tlsmgr -l -t unix -u

-- If you have postfix processes running, kill them all:

$ sudo kill -9 12854 12855 12856 12872

-- after killing all the processes, remove the master.lock file and start postfix with systemctl (see above).

Finally, don't forget that the queue_directory should point to /var/spool/postfix ...