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Anti-relaying policy deficiencies
As known, Zmailer's SMTP policy does not block addresses of the form
and it seems quite difficult to block such things correctly in the
smtpserver. May a propose a different approach: tell the router
to *not* expand local part as full domain address. This way,
"email@example.com" would be treated as a local recipient and the message
would be rejected at the final delivery stage as addressed to a
nonexistet mailbox. This could be an optional feature.
What do you think, Matti?