Error added: 2011-05-19T02:43:31Z
From Dennis Peterson: The sender didn't complete a particular phase of the smtp protocol. Possibly completed the helo xxxxx.xxx but not the mail from:, or neither. Basically it means they hung up on you. Telnet to your mailer and experiment with incomplete stanzas, begining with helo..., mail from:..., rcpt to:..., data... and drop the connection before completing each stanza. Bonus points for using log level 15 or greater. --- I have verified the above. Sometimes, the disconnect can be due to a local firewall, however. Stuart D Gathman
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