In some embodiments, a whitelist such as a whitelist used to hold specific mailing list features, a whitelist used to hold sender/recipient addresses, or a whitelist used to hold sender addresses, may contain {HEAD ~ hashes} of {TAIL ~ content} 
of
In some embodiments , a whitelist such as a whitelist used to hold specific mailing list features , a whitelist used to hold sender / recipient addresses , or a whitelist used to hold sender addresses , may contain { HEAD ~ hashes } of { TAIL ~ content }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL