this formula opens up an email, fills in the to address and adds a subject line
=HYPERLINK("mailto:"&VLOOKUP(A3,'1141 lookup'!AA:AF,5,0)&"?subject="&VLOOKUP(A3,'1141 lookup'!AA:AH,7,0),VLOOKUP(A3,'1141 lookup'!AA:AF,5,0))
this one does the same as above but also adds the body of the email...