Changed SPF checking sections to ignore SPF on enceptions raise from the imported SPF module.
Lookups that matched multiple blocks in the ARIN database that caused recursions in looking up blocks by their NetHandle were causing exceptions because of the code added to file to convert the IP address strings to strait integers.  Code was added to not do this integer conversion during the recursion to named blocks.
Added handling for when 'reject' reason does not contain a %s string expansion for the domain provided.
Added %s variable insertion from IP addresses inserted into text reason from 'smtp5xx_reasons' table.