In some embodiments, a whitelist such as {HEAD ~ 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 hashes of {TAIL ~ content} 
In some embodiments , a whitelist such as { HEAD ~ 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 hashes of { TAIL ~ content }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL