Currently resolving a WAN virus issue where the domain email is getting blacklist every day.
Whilst getting the WAN safe we're having to delist the domain so genuine emails can flow. I've been using http://cbl.abuseat.org
which has been working fine but today their server appears to under strain and I get "The website is too busy, please try again later." when trying to delist.
Are there any other free services out there which delist your domain/IP from being black listed?