Asterisk Dialplan with auto email Caller ID

extensions.conf

exten => 1234,1,NoOp()
exten => 1234,n,Set(${CALLERIDNUM}=${CALLERID(num)})
exten => 1234,n,AGI(InboundCallerID.agi)
exten => 1234,n,System(mail -s "Inbound Caller ID Info" your email address.com < /tmp/InboundCallerID.txt)
exten => 1234,n,Set(GLOBAL(CALLFILENAME)=SAMPLE_${EXTEN:}-${STRFTIME(${EPOCH},,%Y%m%d-%H%M%S)})
exten => 1234,n,Dial(Zap/xx,15)
exten => 1234,n,Hangup