Mail: raise number of arguments parsed in smtp. MAIL FROM / RCPT TO commands may have arbitrary number of parameters defined by various extensions. I'm aware of at least following used in wild: SIZE=, AUTH=, RET=, ENVID= (DSN), BODY= (8BITMIME). Additionally, rfc2821 address may contain spaces - so it will be parsed as several arguments too. Suppose 11 arguments is enough (3 was definitely not enough).