Returns a lua table consisting of one entry per address in the header. Each
entry is a single simple address object that has domain, user, email and
name fields with the same semantics as addressheader.
for_,addressinipairs(msg:to_header().list)doprint('to entry',address)-- prints something like:-- to entry {"name":null,"address":"user@example.com"}-- to entry {"name":"John Smith","address":"john.smith@example.com"}end