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This useful while we need to manually delete the mail delivery mails in queues

The following command for two action doing(files with matches):

1.First Action is searching using word ‘Subject : failure notice’ in mails in the qmail queue.

2. Second Action is move that collected matched emails into the ‘garbage’ folder. Afterthat we delete that folder only..

Note: Before using this simple script,we need to create ‘garbage’ folder

grep -l -r ‘Subject : failure notice’ /var/qmail/queue/mess/0 | while read f; do mv “$f” garbage; done

-l, –files-with-matches

Suppress normal output; instead print the name of each input

file from which output would normally have been printed. The

scanning will stop on the first match.

-R, -r, –recursive

Read all files under each directory, recursively; this is equiv-

alent to the -d recurse option.

garbage — > folder.. we want to create it..

This following command used for files without mach and move that without match files into the single folder (out):

grep -L -r ‘test’ /home/* | while read f; do mv “$f” garbage; done

-L, –files-without-match

Suppress normal output; instead print the name of each input

file from which no output would normally have been printed. The

scanning will stop on the first match.

-R, -r, –recursive

Read all files under each directory, recursively; this is equiv-

alent to the -d recurse option.

You can view all messages in the email queue.

To Display all Messages in the Email Queue

1. Log in to your server using SSH.

2. At the command prompt, type:

/var/qmail/bin/qmail-qstat

You can see how many mails in the qmailqueue

1. To list multiple messages in the queue, type:

/var/qmail/bin/qmail-qread

You can think of the /etc/aliases file as a mailing list file.

The first column has the mailing list name (sometimes called a virtual mailbox)

The second column has the members of the mailing list separated by commas.

To start, sendmail searches the first column of the file for a match.

If there is no match, then sendmail assumes the recipient is a regular user on the local server and deposits the mail in their mailbox.

If it finds a match in the first column, sendmail notes the nickname entry in the second column. It then searches for the nickname again in the first column to see if the recipient isn’t on yet another mailing list.

If sendmail doesn’t find a duplicate, it assumes the recipient is a regular user on the local server and deposits the mail in their mailbox.

If the recipient is a mailing list, then sendmail goes through the process all over again to determine if any of the members is on yet another list, and when it is all finished, they all get a copy of the e-mail message.

In the example that follows,

you can see that mail sent to users bin, daemon, lp, shutdown, apache, named, and so on by system processes will all be sent to user  (or mailing list) root.

In this case, root is actually an alias for a mailing list consisting of user paul and webmaster@example.com.

# Basic system aliases -- these MUST be present.
mailer-daemon:        postmaster
postmaster:           root

# General redirections for pseudo accounts.
bin:                  root
daemon:               root
...
 ...
abuse:                root
# trap decode to catch security attacks
decode:               root

# Person who should get root's mail
root:                 paul,webmaster@example.com

Notice that there are no spaces between the mailing list entries for root: You will get errors if you add spaces.

Note:

The default /etc/aliases file installed with RedHat / Fedora has the last line of this sample commented out with a #, you may want to delete the comment and change user paul to another user. Also after editing this file, you’ll have to convert it into a sendmail readable database file named /etc/aliases.db. Here is the command to do that:

[root@bigboy tmp]# newaliases

In this simple mailing list example,

mail sent to root actually goes to user account paul and webmaster@example.com

The /etc/mail/virtusertable file

The /etc/mail/virtusertable file contains a set of simple instructions on what to do with received mail.

The first column lists the target email address

The second column lists the local user’s mail box, a remote email address, or a mailing list entry in the /etc/aliases file to which the email should be forwarded.

If there is no match in the virtusertable file, sendmail checks for the full email address in the /etc/aliases file.

webmaster@example.com   webmasters
@example.com                   paul
sales@redhat.com             sales@example.com
paul@redhat.com              paul
finance@redhat.com           paul
@redhat.com                  error:nouser User unknown

In this example,

mail sent to:

• webmaster@example.com will go to local user (or mailing list) webmasters, all other mail to example.com will go to local user paul.
• sales@redhat.com will go to the sales department @example.com.
• paul and finance @redhat.com goes to local user (or mailing list) paul

All other users @redhat.com receive a bounce back message stating “User unknown”.

After editing the /etc/mail/virtusertable file,

you have to convert it into a sendmail-readable database file named /etc/mail/virtusertable.db with two commands:

[root@bigboy tmp]# cd /etc/mail
[root@bigboy mail]# make