","
";"
"<"
">"
"@"
":"
# tab character
"\x09"
# new line character
"\x0A"
"  "
"Subject: "
"Subject"
"To"
"To: "
"Date"
"Date: "
"Message-Id"
"Message-Id: "
"From"
"From: "
"Cc"
"Cc: "
"Bcc"
"Bcc: "