[Bro] [bro] smtp log strangeness

[Tim Desrochers]

While parsing smpt logs I notice a bunch of strange data contained in my from/to/subject fields

Example:
"subject":"=?utf-8?q?CBO_drops_the_March_base=E2=80=A6line?="
"subject":"=?Windows-1252?Q?Automatic_reply:_CBO_drops_the_March_base=85line?=",
"from":"\u0022NAMEOFPERSON\u0022 <first.middle.last at something.com>"

Why am I getting all of this extra info in these fields?

I am printing logs as JSON not CSV.

Thanks in advance
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