X-Mailer Header Not Being Picked Up With Resend Command

[John P Verel]

When I resend a message, using esc e, I find that my X-Mailer header is
not picked up from the original message.  The manual indicates that
weeding is used when resending.  My .muttrc contains:

ignore
unignore        from: subject to cc mail-followup-to \
                 date x-mailer x-url


weed in not set, so should default to yes, per the manual.

What obvious thing am I missing?

TIA

John