Try using the tools at
DNSStuff.com to find information from the
Spam Database Lookup. Your provider is responsible if they are being blocked as it will affect others they are hosting. Possibly check for stats in your Control Panel for records of suspicious activity.
Spam blocking may be done by lots of servers depending on tools they're using. The problem may be on the User's end, too. Although it may be too late, all online email addresses should be "munged" (
How to Avoid Spambots) in the best way possible to keep 'Bots from harvesting your email address.
Browsers used may affect whether a site gets loaded or not. Many browsers have a black list and your site may have been listed. User's need to check list and add your site as Approved.
Some related info:
Why Am I Getting All This Spam?Did you know?
www.uceprotect.net,
cbl.abuseat.org, and
spamhaus.orgAnti-SPAM Measures of the IAEAHow can valid IP addresses blocked by InterScan Messaging Hosted Security (IMHS) be removed from the ERS databases?There is an official site where you can request a site to be unblocked, but, for the life of me, I can't recall the name or URL.
Ron
Edited by Major Payne, 16 November 2007 - 08:28 PM.