Postfix Flush the Mail Queue

Postfix Flush the Mail Queue


Traditionally you use the "sendmail -q" command to flush mail queue under Sendmail MTA. Under Postfix MTA, just enter the following command to flush the mail queue:
# postfix flush
OR
# postfix -f

To see mail queue, enter:
# mailq

To remove all mail from the queue, enter:
# postsuper -d ALL

To remove all mails in the deferred queue, enter:
# postsuper -d ALL deferred
postfix-delete.pl script

Following script deletes all mail from the mailq which matches the regular expression specified as the first argument (Credit: ??? - I found it on old good newsgroup)

#!/usr/bin/perl
 
$REGEXP = shift || die "no email-adress given (regexp-style, e.g. bl.*\@yahoo.com)!";
 
@data = qx</usr/sbin/postqueue -p>;
for (@data) {
  if (/^(\w+)(\*|\!)?\s/) {
     $queue_id = $1;
  }
  if($queue_id) {
    if (/$REGEXP/i) {
      $Q{$queue_id} = 1;
      $queue_id = "";
    }
  }
}
 
#open(POSTSUPER,"|cat") || die "couldn't open postsuper" ;
open(POSTSUPER,"|postsuper -d -") || die "couldn't open postsuper" ;
 
foreach (keys %Q) {
  print POSTSUPER "$_\n";
};
close(POSTSUPER);
 

For example, delete all queued messages from or to the domain called fackspamdomain.com, enter:
./postfix-delete.pl fackspamdomain.com
Delete all queued messages that contain the word "xyz" in the e-mail address:
./postfix-delete.pl xyz

Adding Recapcha in Joomla

Download the Recapcha plugin from here : http://www.unixmen.com/joomla-tutorials/776-howto-integrate-recaptcha-antispam-in-joomla-contact-and-registration-form-

1. Login to Joomla Administration --> Extensions--> Install/Uninstall

2. Upload the package file and Click on "Upload Fle and Install"

3. Go to Plugin Manager and it will be shown as System - JEZ ReCaptcha, publish it
    and then click on it .

4 .It will open the setting for JEZ ReCapcha plugin ,do the following .
* Enabled : yes
reCAPTCHA Public :
reCAPTCHA Private :
Inclusion Syntax : No
Auto-verify : Yes

Note : The reptcha public and private key has to be generated by signing  into you google accounts /

https://admin.recaptcha.net/recaptcha/sites/

--
Regards
---
Rachit Seth

How to recover VM on Xenserver When VM is not bootable from updated kernel (Citrics XenServer )

1 . Create/Restore an new VM (say rescue vm )on the xenserver where the crashed VM is located.

2 . Stop the  rescue  vm and deattach the storage device .

3 . Attach this storage  device on crashed vm .

4 . Change the crashed disk vbd to non bootable after checking with below command

    xe vm-disk-list vm="crashedvm name" l ( It will list the storage devices with their uuid's ,for each disk there is a vdi and vbd uuid )

  xe vbd-param-set uuid=7f6a1563-fc76-31d8-49c2-c03466ca836b bootable=false

5 . Change the rescue vm disk vbd  to bootable .

  xe vbd-param-set uuid=5f64a143633-fc76-313-59a2-d13466ca3egf bootable=true

6  Start the crashed vm ,it will boot with the rescue vm's disk.
    Now ,mount the  original disk  whose vbd you  changed to non bootable earlier .

    mount /dev/xvda /mnt

7 . Going  to /mnt ,we will get the old filesystem.
     cd /mnt/boot/

    Changed the grub.conf default  entry   to 1 i.e the older version of kernel is selected( as i have updated the
    kernel after which vm  does not starts)

8. Stop the this crash vm again .

9 . Deattach  the rescue disk from the crashed vm and change the crashed disk's vbd again to bootable .
     
       xe vbd-param-set uuid=7f6a1563-fc76-31d8-49c2-c03466ca836b bootable=true.

10 .Now try to start it  and now it is  bootable (from earlier  kernel.)