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