Net::SMTP=GLOB(0x180f4a0)>>> RCPT TO:<joesmith@foo.com>
Net::SMTP=GLOB(0x180f4a0)<<< 553 Sorry, that domain isn't in my list of allowed rcpthosts.
Net::SMTP=GLOB(0x180f4a0)>>> DATA
Net::SMTP=GLOB(0x180f4a0)<<< 503 You must send RCPT TO: first