A\"‡" [smtpmail-smtp-server
signals-data shrink-window-if-larger-than-buffer display-buffer get-buffer
format "*trace of SMTP session to %s*" signal] 6)
smtpmail-send-it()
#[nil " ‡" [message-send-mail-function] 1]()
gnus-agent-send-mail()
message-send-mail(nil)
message-send-via-mail(nil)
message-send(nil)
message-send-and-exit(nil)
call-interactively(message-send-and-exit)

When I turn the Wifi off, and go back to cable mode, all is ok.

All I can say is that it hangs on something like:

354 End Data With <CR><LF>.<CR><LF>

before it dumps the backtrace given above.

Any hint ?

Regards.
-- 
Xavier MAILLARD (GnuPG: 1024D/1E028EA5)
EmacsOS user (http://emacsfr.org)
APRIL (http://www.april.org)