Net::SMTP=GLOB(0x977cdc0)>>> MAIL FROM: Net::SMTP=GLOB(0x977cdc0)<<< 250 2.1.0 Sender OK Net::SMTP=GLOB(0x977cdc0)>>> RCPT TO: NOTIFY=FAILURE Net::SMTP=GLOB(0x977cdc0)<<< 250 2.1.5 Recipient OK Net::SMTP=GLOB(0x977cdc0)>>> RCPT TO: NOTIFY=FAILURE Net::SMTP=GLOB(0x977cdc0)<<< 550 5.1.1 User unknown