Keywords:
Index to contents RFC2822
The Keywords:
header is used to list significant words from the
body of the mail message that aid in the indexing of
its contents. This header is never added by
sendmail. Although some MUAs
can create this header, it is usually created by
Usenet news-posting programs.
The field for the Keywords: header is arbitrary text.
This header should never be declared in the
sendmail configuration
file.
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