Edit the file /etc/postfix/master.cf

It probably looks like this

# =============================================================
    # service type  private unpriv  chroot  wakeup  maxproc command
    #               (yes)   (yes)   (yes)   (never) (100)
    # =============================================================
    smtp      inet  n       -       -       -       -       smtpd

Change it to

# =============================================================
    # service type  private unpriv  chroot  wakeup  maxproc command
    #               (yes)   (yes)   (yes)   (never) (100)
    # =============================================================
    smtp      inet  n       -       n       -       -       smtpd

Now restart and reload the postfix mail server and you’re good to go.

[root@mail ~]# /etc/init.d/postfix restart
Shutting down postfix:                                     [  OK  ]
Starting postfix:                                          [  OK  ]
[root@mail ~]# /etc/init.d/postfix reload
Reloading postfix:                                         [  OK  ]

The post Fix Incoming Mail Delay With Postfix appeared first on VeriTeknik.

First of all, check that you DO have another ip address on another interface at the server. Either by ifconfig or anything else.

To change the outgoing IP on a postfix mail server, edit the file /etc/postfix/master.cf

Find this part in the file,

smtp      unix  -       -       -       -       -       smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay     unix  -       -       -       -       -       smtp
        -o smtp_fallback_relay=

You should modify it to look like below

smtp      unix  -       -       -       -       -       smtp
        -o smtp_bind_address=192.168.1.1
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay     unix  -       -       -       -       -       smtp
        -o smtp_bind_address=192.168.1.1
        -o smtp_fallback_relay=

Of course, change the IP address 192.168.1.1 to whatever your secondary IP is.

Then restart and reload the postfix server.

[root@mail ~]# /etc/init.d/postfix restart
Shutting down postfix:                                     [  OK  ]
Starting postfix:                                          [  OK  ]
[root@mail ~]# /etc/init.d/postfix reload
Reloading postfix:                                         [  OK  ]

That’s it!

The post Change Outgoing IP of Postfix Mail Server appeared first on VeriTeknik.

exim -bpru | tr '\n' + | sed -e "s/++/=/g" | tr -d + | tr = '\n' | grep "spammer@email.com" | awk {'print $3'} | xargs exim -Mrm

Simple replace the spammer@email.com address with the potential spammer.
Don’t forget that this command uses the whole queue list to process. Sometimes if you have hundreds of thousands of email from this spammer in queue, it will get hard to process them all for the system. So instead of using the whole queue list, we can break it down to pieces with the head command.

The command below will break it down to pieces of 5000, so if you have more than 5000, you should run this command several times.

exim -bpru | head -n 5000 | tr '\n' + | sed -e "s/++/=/g" | tr -d + | tr = '\n' | grep "spammer@email.com" | awk {'print $3'} | xargs exim -Mrm

To delete all mails from the queue, simply use this command.

exim -bp | awk '/^ *[0-9]+[mhd]/{print "exim -Mrm " $3}' | sh

The post Delete Mail From Queue in Exim appeared first on VeriTeknik.