-- Unread count (unified inbox)
tell application "Mail" to unread count of inbox

-- List accounts
tell application "Mail" to name of every account

-- Search by sender
tell application "Mail"
    tell account "Google"
        tell mailbox "INBOX"
            every message whose sender contains "amazon"
        end tell
    end tell
end tell

tell application "Mail"
    set msg to make new outgoing message with properties {visible:false, subject:"Subject", content:"Body text"}
    tell msg
        make new to recipient with properties {address:"user@example.com"}
    end tell
    send msg
end tell

tell application "Mail"
    tell account "Google"
        tell mailbox "INBOX"
            set msg to first message
            set read status of msg to true
            set flagged status of msg to true
            move msg to mailbox "Archive" of account "Google"
        end tell
    end tell
end tell

tell application "Mail"
    tell account "Google"
        tell mailbox "INBOX"
            set msg to first message
            set att to first mail attachment of msg
            save att in POSIX file "/Users/username/Downloads/" & name of att
        end tell
    end tell
end tell

with timeout of 30 seconds
    tell application "Mail"
        -- code here
    end tell
end timeout

timeout 35 osascript -e 'with timeout of 30 seconds
    tell application "Mail"
        -- code here
    end tell
end timeout'

try
    -- operation
on error errMsg number errNum
    return "FAILED: " & errMsg & " (" & errNum & ")"
end try