> MK> Only _type 2_ echomail needs seenby lines, because it's
 > MK> speced that way.

 ac>"Echomail" is defined by FTS-0004.

 MK> That's type 2 echomail.

FTS4 defines echomail, but the form that echomail takes when distributed is
beyond the scope of FTS4.  Thus, the "Type 2" format is not
defined by FTS4.

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