# extensions.conf
[fax]
exten => s,1,SetVar(FAXFILE=/var/spool/asterisk/fax/${TIMESTAMP}.tiff)
exten => s,2,rxfax(${FAXFILE})

exten => i,1,Hangup
exten => t,1,Hangup

exten => h,1,system(/usr/bin/mailfax ${FAXFILE} ${FAXEMAIL} ${CALLERIDNUM})

# /usr/bin/mailfax
#!/bin/sh

FAXFILE=$1 
EMAIL=$2
CALLERIDNUM=$3
FAX=fax-$(basename $FAXFILE).pdf

tiff2ps -2eaz $FAXFILE | ps2pdf - | mime-construct --to $EMAIL --subject "Fax de $CALLERIDNUM" --attachment $FAX --type application/pdf --file -

#tiff2pdf -p A4 $FAXFILE | mime-construct --to $EMAIL --subject "Fax de $CALLERIDNUM" --attachment $FAX --type application/pdf --file -