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Internet Message Format (IMF) is specified by RFC 5322. It defines a variety of header fields, such as To, From, and Subject.

It also defines the Comments header field and the Keywords header field.

Does anything actually use these two header fields today, or are they totally superfulous?

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closed as not constructive by Xavierjazz, RedGrittyBrick, TFM, 8088, Ƭᴇcʜιᴇ007 Nov 15 '12 at 4:03

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

I'm not sure what actual problem you are facing? – RedGrittyBrick Nov 14 '12 at 21:33
Pretty simple: Comments and Keywords are header available to email clients and servers. As far as I can tell, none of my clients use them. I am wondering if any clients or servers actually use them. – james.garriss Nov 15 '12 at 14:19
I'm not sure why this is considered "not constructive". I'm very curious to know the answer, and answers would certainly be supported by facts and references. – npdoty Nov 21 '13 at 22:03
Closers can be trigger happy. It happens. – james.garriss Nov 21 '13 at 23:27

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