Guile: unbound variable mu-mailer

Hello,

This is not really a bug, maybe it is.

Now I am exploring Guile functions, as I wish to be able to send
emails programmatically, and save them into the corresponding
folders. This may help me so much in relations with the clients.

1) I am trying to set From field, would this be correct?

(mu-message-set-header msg "From" "[email protected]" #t)



2) How do I set or configure: mu-username->email in the system?



3) If I review the msg object:
$25 = #<message "[email protected]" "Thu Dec 15 08:23"   3 56 >

then I can see there is missing time zone, it should be there, just
like other emails.


4) When using:

(define msg (mu-message-create )
(mu-message-send msg)

I get problem:

ERROR: In procedure mu-message-send:
ERROR: In procedure module-lookup: Unbound variable: mu-mailer

so, how to set the mu-mailer?


Jean Louis