qmail queue

To Display all Messages in the Email Queue

Log in to your server using SSH.
Type su -.
Enter the password you used to log in to your server.
At the command prompt, type:
/var/qmail/bin/qmail-qstat
To list multiple messages in the queue, type:
/var/qmail/bin/qmail-qread


lsof command example

Type the following command to see IPv4 port(s), enter:
# lsof -Pnl +M -i4
Type the following command to see IPv6 listing port(s), enter:
# lsof -Pnl +M -i6

allow certain php functions for a specific domain

When dealing with the security of your server you will eventually get to the part were you will want to disable some php functions. The only problem on shared hosting is that you cannot disable exec for a domain and enable that function for an other that needs it because of some lame script. Eventually you will get to the part were you will need to enable exec on the entire server because of one site.
There is a solution to this and it’s called suhosin.
Suhosin has a configuration variable called ”suhosin.executor.func.blacklist” which can be used to disable some php functions. The difference between this variable and disable_functions in php.ini is that it can be set for all the sites and then it can be modified for a domain only (it can be overwritten) so you will be able to disable exec on the entire server and enable that function for a single domain.
I will not write here how to install suhosin.
Also, you only need the extension for this so you do not need to patch php and recompile.
IMPORTANT: I have noticed that the suhosin extension 0.9.20 will not work anymore as there are some problems with it. It’s ok as long as we have 0.9.18. Probably the next version of the extension will be fixed to work ok again so remember to use version 0.9.18 for this until the problem is fixed.

Ok, so to use suhosin as the php function blocker we need to comment out disable_functions in php ini (yes, enable all the functions) and then set in php.ini
suhosin.executor.func.blacklist to something like this:

suhosin.executor.func.blacklist = exec, passthru, shell_exec, system, pcntl_exec, proc_open, proc_nice, proc_terminate, proc_get_status, proc_close, leak, apache_child_terminate, posix_kill, posix_mkfifo, posix_setpgid, posix_setsid, posix_setuid, escapeshellcmd, escapeshellarg

You can add as many functions as you like.
After that, all the functions added in suhosin.executor.func.blacklist will not work anymore in php scripts. If you need to enable a function for a domain, let’s say
exec, you will have to edit apache configuration file and add suhosin.executor.func.blacklist without the exec function:


ServerAlias www.test.com
ServerAdmin webmaster@test.com
DocumentRoot /home/test/public_html

php_admin_value suhosin.executor.func.blacklist "passthru, show_source, shell_exec, system, pcntl_exec, popen, pclose, proc_open, proc_nice, proc_terminate, proc_get_status, proc_close, leak, apache_child_terminate, posix_kill, posix_mkfifo, posix_setpgid, posix_setsid, posix_setuid, escapeshellcmd, escapeshellarg"



Now exec is disable on the server but it’s enabled on the test domain.
Hope this helps.

exim commands

Exim Commands

exim -bpc - Print a count of the messages in the queue
exim -bp - Print a listing of the messages in the queue (time queued, size, message-id,
sender, recipient):
exim -M emailID - force delivery of one message
exim -Mvl messageID - View Log for message
exim -Mvb messageID - View Body for message
exim -Mvh messageID - View Header for message
exim -Mrm messageID - ReMove message (no errors sent)
exiqgrep -zi | xargs exim -Mrm - Remove all frozen mails in q


REMOVE MAILS BY ID

exim -v -Mrm (MAIL ID HERE)

LIST QUEDED MAILS

exim -bp

OUTPUT NUMBER OF QUEDED MAILS

exim -bpc

DELETE FROZEN MAILS

exim -bp | awk '$6~"frozen" { print $3 }' | xargs exim -Mrm

DELIVER FORCEFULLY EMAILS

exim -qff -v -C /etc/exim.conf &

FREEZE MAILS FROM SENDER

exiqgrep -i -f (MAIL ADDRESS HERE) | xargs exim -Mf

REMOVE MAILS FROM SENDER

exiqgrep -i -f (MAIL ADDRESS HERE) | xargs exim -Mrm

Remove root mails

exim -bp |grep "hostname" |awk '{print $3}' |xargs exim -Mrm


Forcefully sending mails from a domain

exim -v -Rff domainname.com


Remove all frozen messages:

root@localhost# exiqgrep -z -i | xargs exim -Mrm

Remove all messages older than five days (86400 * 5 = 432000 seconds):

root@localhost# exiqgrep -o 432000 -i | xargs exim -Mrm


Start a queue run:

root@localhost# exim -q -v

Start a queue run for just local deliveries:

root@localhost# exim -ql -v

Remove a message from the queue:

root@localhost# exim -Mrm [ ... ]

Freeze a message:

root@localhost# exim -Mf [ ... ]

Thaw a message:

root@localhost# exim -Mt [ ... ]

Deliver a message, whether it's frozen or not, whether the retry time has been reached or not:

root@localhost# exim -M [ ... ]

Deliver a message, but only if the retry time has been reached:

root@localhost# exim -Mc [ ... ]

Force a message to fail and bounce as "cancelled by administrator":

root@localhost# exim -Mg [ ... ]

Remove all frozen messages:

root@localhost# exiqgrep -z -i | xargs exim -Mrm

Remove all messages older than five days (86400 * 5 = 432000 seconds):

root@localhost# exiqgrep -o 432000 -i | xargs exim -Mrm

Freeze all queued mail from a given sender:

root@localhost# exiqgrep -i -f luser@example.tld | xargs exim -Mf

View a message's headers:

root@localhost# exim -Mvh

View a message's body:

root@localhost# exim -Mvb

View a message's logs:

root@localhost# exim -Mvl

Add a recipient to a message:

root@localhost# exim -Mar

[

... ]

Edit the sender of a message:

root@localhost# exim -Mes

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