If you are using SpamAssassin or SpamCopURI, they have built-in support for local whitelists which will prevent those message body URI hosts from being checked: URIDNBL rules: (Please see the actual rules for the standard list of domains to exclude from checking.) # Top 125 domains whitelisted by SURBL uridnsbl_skip_domain yahoo.com w3.org msn.com com.com yimg.com uridnsbl_skip_domain hotmail.com doubleclick.net flowgo.com ebaystatic.com aol.com […] SpamCopURI also has a built-in whitelist function: whitelist_spamcop_uri *.yahoo.com Other SURBL applications may have similar exclusion features. If not, their authors may want to consider adding local whitelisting. Notes: • These local whitelists prevent those specific domains from being checked. They do not provide a negative score or bypass the message around other testing, including testing of any other URIs that happen to be in the message. So if a message has a URI for yahoo.com and hugepills.com, hugepills.com will still get check