If you have installed one of the following, you can decode `X-Face:' field in message buffer and you will see face image.
If there is an encoded X-Face string in a file `~/.xface' (the
value of the variable
wl-x-face-file), it is inserted as a
`X-Face:' field in the draft buffer (if
wl-auto-insert-x-face is non-nil).
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