Tente:
--For Demo
set TempPhotos to (choose folder)
set msgText to "My Test"
tell application "Finder" to set attchList to (every item of TempPhotos) as alias list
set theSender to "Me<[email protected]>"
set recipName to "You"
set recipAddress to "[email protected]"
tell application "Mail"
set newmessage to make new outgoing message with properties {subject:"Important File Attachment", content:msgText & return & return, visible:false}
tell newmessage
set visible to false
set sender to theSender
make new to recipient with properties {name:recipName, address:recipAddress}
repeat with attach in attchList
make new attachment with properties {file name:(contents of attach)}
end repeat
--For Demo
set visible to true
end tell
--send newmessage
end tell