How to find out if your web host is blacklisted
If you’re looking for somewhere to host your website, beware of any web hosts who tempt you with low prices.
Low cost hosting companies keep their prices down by operating a "no questions asked" hosting policy, storing large number of websites (sometimes over 100) on their servers without vetting any of their clients first. The problem is, if one of their clients is using their hosting to send out spam, anyone else who has their website hosted on the same server will find they are blacklisted, with the consequence of having their websites and email blocked.
Low cost hosting companies will usually provide the minimum of support (often by email only), so if you are unfortunate enough to discover your website on a blacklisted server, you may be waiting hours for support. In many cases, the hosting company will wash their hands of the matter and say it’s out of their control.