How to change exim interface IP

Few times your server’s main/shared IP address may get black listed by most of RBLs due to x reasons.
In such situations, it would be very difficult to receive/send some important emails due to this black list.

In such situation a quick solution is to route the emails through a secondary IP address on the same server which is not black listed under those RBLs.

You can contact customer support or you can order IP from client control panel. 

The mail server on cpanel i.e exim allows you to change the default IP address used by the mail server so that you would be able to route all emails through this new secondary IP address.

Here are the step by step instructions for you to configure your exim mail server to use new IP address.

Step 1 : Shutdown the exim service.
# service exim stop or /etc/init.d/exim stop
Step 2 : Edit your exim configuration file.
# vi /etc/exim.conf
Step 3: go to “remote_smtp” section under “TRANSPORTS CONFIGURATION”.
By default it would look like below:
driver = smtp
interface = ${if exists {/etc/mailips}{${lookup{$sender_address_domain}lsearch{/etc/mailips}{$value}{}}}{}}
helo_data = ${if exists {/etc/mailhelo}{${lookup{$sender_address_domain}lsearch{/etc/mailhelo}{$value}{$primary_hostname}}}{$primary_ho stname}}

Step 4 : Remove or comment line containing “interface” and “helo_data” and add new “interface” to match with that of your new IP address. It should look like as follows:
driver = smtp
interface = # Your IP address.

Step 5 : Save your changes and exit out from your exim configuration file.

Note : Dont forget to set read only attributes on exim configuration file, so that it wont get reset to default automatically.

You can do it using following command:
# chattr +aui /etc/exim.conf

Step 6 : start exim service on your server.
# service exim restart or /etc/init.d/exim restart

Step 7 : Make sure to set reverse DNS for this new IP address to point a valid FQDN.

Step 8 : Try sending a test email and you will find that, it was sent using this new IP address configured under your exim configuration.

You can verify it by checking the header of new email under exim’s log file i.e /var/log/exim_mainlog

You can view the video KB of this by clicking here.

  • exim ip, change exim ip
  • 4 Users Found This Useful
Was this answer helpful?

Related Articles

How To Install and Use Docker on Ubuntu 16.04

Introduction Docker is an application that makes it simple and easy to run application processes...

Change Main IP of the server :: Vesta Panel

If we are changing the main IP of a server installed with Vesta panel, we can use the following...

cPanel: Apache-FastCGI Data Timeout Error

If you are using a cPanel server and have FastCGI enabled in Apache, you might be facing the...

Domainkey installer in cPanel

You can use the following cPanel script to install domainkey for an account...

Email issues :: Common Troubleshooting Steps

Here I will discuss some common errors and their solution: We are using a mail relay setup for...