Unable to get information from zmcontrol
This issue is mainly occurring due to the incorrect permission of /opt/zimbra/redolog and /opt/zimbra/redolog/redo.log.
Do the following steps:
[root@zimbra bin]# ls -l /opt/zimbra/redolog
total 8
drwxr-x— 2 root root 4096 Mar 20 13:17 archive
-rw-r—– 1 root root 1292 Apr 11 19:11 redo.log
The chower ship of /opt/zimbra/redolog/redo.log and /opt/zimbra/redolog must be zimbra.
chown -R zimbra.zimbra /opt/zimbra/redolog/
[root@zimbra bin]# ls -l /opt/zimbra/redolog
total 8
drwxr-x— 2 zimbra zimbra 4096 Mar 20 19:17 archive
-rw-r—– 1 zimbra zimbra 1292 Apr 11 19:59 /opt/zimbra/redolog/redo.log
Now try the “zmcontrol status” and “zmcontrol start”. This will work fine now.
Note: If you are facing difficulty in running “zmcontrol status”, try the exact path “/opt/zimbra/bin/zmcontrol status”.
Tags: zimbra, zmcontrol
Flush mail queue in sendmail
To flush the mail queue manually in sendmail servers, use
$ /usr/sbin/sendmail -q -v
Better way
Make a backup of the existing queue directory.
Create the ‘mqueue’ directory with the same permissions and ownership. Then, type in
$ /usr/sbin/sendmail -q -v -OQueueDirectory=/var/spool/mqueue.bak
You can use the same command to flush any sendmail queue as some servers have multiple queue setup like mqueue, mqueue.site, clientmqueue, q1, q2 etc.
Tags: Flush, mail, queue, sendmail
Change SMTP source IP address in sendmail
1. Edit sendmail.cf search for ClientPortOptions
2. Change
#O ClientPortOptions=Family=inet, Address=x.x.x.x
to
O ClientPortOptions=Family=inet, Address=
3. Restart sendmail
4. Verify by sending a mail and checking the full header
CLIENT_OPTIONS(`field1=value1,field2=value2,…’) in sendmail.mc file is equivalent to ClientPortOptions in the sendmail.cf file.
Tags: sendmail, SMTP, source IP address
Script for deleting all the mails in Qmail
1. create a file with the following statements, say delqmail
service qmail stop
find /var/qmail/queue/mess -type f -exec rm {} \;
find /var/qmail/queue/info -type f -exec rm {} \;
find /var/qmail/queue/local -type f -exec rm {} \;
find /var/qmail/queue/intd -type f -exec rm {} \;
find /var/qmail/queue/todo -type f -exec rm {} \;
find /var/qmail/queue/remote -type f -exec rm {} \;
service qmail start
You may also include the directories like /var/qmail/queue/mess/bounce… etc.
2. Give executable permission to this file
3. Execute the script
Tags: deleting, mails, Qmail
How to change SMTP port in postfix
The default SMTP port is 25. In Postfix we can change it to some other port (say 6000) using the following steps.
Open the file master.cf.
$ vi /etc/postfix/master.cf
Add the following line to the file.
6000 inet n - n - - smtpd
Restart postfix.
$ /etc/init.d/postfix restart
You can check the connection to the new port using telnet. Also make sure that the new port is not blocked in the server firewall.
Tags: Port, postfix, SMTP
