Knowledgebase: WebHosting & E-mail
How to avoid your Mail Server IP being blacklisted
Posted by Shivin Hameed on 27 September 2011 05:20 PM

There are a number of reasons your public IP address or your email server IP address may have been listed on any blacklisting organizations , including:

  • The email server at this IP address contains a virus and has been sending out spam
  • The email server at this IP address may be configured incorrectly, may be as an open mail relay.
  • The username / password of a particular mailbox is compromised. You should abide a strict password complexity policy to avoid this.
  • The PC at this IP address may be infected with a virus or botnet software program
  • An individual in the organization at this IP address may have a PC infected with a virus or botnet program
  • This IP address may be a dynamic IP address which was previously utilized by a known spammer
  • The marketing department of a company at this IP address may be sending out bulk emails that do not comply with the CAN-SPAM Act
  • This IP address may have a insecure wireless network attached to it which could allow unknown users to use it's network connection to send out bulk email

How to de-list the blacklisted IP :

1) visit http://mxtoolbox.com/blacklists.aspx and check the IP against various known blacklists.

2) Proceed further to delist the IP from the corresponding blacklist on which your IP shows listed.

NOTE : Before submitting a de-list request, make sure that you have taken necessary preventive measures to avoid the above mentioned points from happening or else, your IP will be blacklisted again. Also, please note that the reputation of the IP provided to you falls completely under your responsibility.

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