Date:30 January 2007 I Comments: 0 I Views:6,279

Following on from a previous post about BT broadband it seems as if the problem is getting worse.

Emails are not being delivered across the nation and beyond…!

The problem seems to lie with an organisation called SORBS. They are responsible for IP and email blacklists which are used by many SPAM filtering systems.

This is affecting people with ‘dynamic’ IP addresses which are used by almost everyone that accesses the internet.

Extract from Wikipedia:

‘An IP address (Internet Protocol address) is a unique address that devices use in order to identify and communicate with each other on a computer network utilizing the Internet Protocol standard (IP)—in simpler terms, a computer address. Any participating network device—including routers, computers, time-servers, printers, Internet fax machines, and some telephones—can have their own unique address. Also, many people can find personal information through IP addresses.’

A dynamic IP address is one that changes everytime you log into the internet which provides additional security to the end user.

The problem with dynamic IP addresses is they are not liked by SORBS.

If you send an email from your own domain name eg: it gets routed via your ISP and if it’s tracked back it can look as though it’s come from your ISP and not This can potentially flag the IP address of your ISP as SPAM because it’s sending mail that it is saying is coming from somewhere else ie.

I’m getting a ‘static’ IP address for my broadband connection but I have no real guarantee that this will work and solve my failed email delivery problem.

The alternative is some clever person out there already knows a simple solution and I just haven’t found it yet…

Category: Business Costs