AppleScript to send e-mail, using Apple's Mail, with multiple recipients, cc, bcc and attachments

AppleScript Mail Send.scpt

tell application "Mail"
	
	set theFrom to ""
	set theTos to {}
	set theCcs to {}
	set theBccs to {}
	
	set theSubject to ""
	set theContent to ""
	set theSignature to ""
	set theAttachments to {}
	set theDelay to 1
	
	set theMessage to make new outgoing message with properties {sender:theFrom, subject:theSubject, content:theContent, visible:false}
	tell theMessage
		repeat with theTo in theTos
			make new recipient at end of to recipients with properties {address:theTo}
		end repeat
		repeat with theCc in theCcs
			make new cc recipient at end of cc recipients with properties {address:theCc}
		end repeat
		repeat with theBcc in theBccs
			make new bcc recipient at end of bcc recipients with properties {address:theBcc}
		end repeat
		repeat with theAttachment in theAttachments
			make new attachment with properties {file name:theAttachment as alias} at after last paragraph
			delay theDelay
		end repeat
	end tell
	
	# macOS 10.12+ know bug
	# https://stackoverflow.com/questions/39860859/setting-message-signature-of-outgoing-message-using-applescript
	# set message signature of theMessage to signature theSignature
	
	send theMessage
	
end tell