email bounce back message cannot be delivered encrypted

Selecting a solution: The appropriate solution depends on the method the spammer is using: Unless the spammer has your password (see below), your domainname was probably selected randomly. The bounces you're seeing are collectively known as backscatter - they are falloutįrom the interactions of two or more third parties.

This isīecause the more he does it, the more the address he's using gets blacklisted, and thus And note that he probably won't keep forging mail in your name for long. Least the same number of messages that were delivered successfully - you don't see thoseĪt all. Also note that all you're seeing is the bounces, there are likely to be at He's just using your address for hisĬonvenience.

Note: the spammer is not trying to spam you, and probably isn't trying to attack you (although anĪttack by this method is not unknown, see joe-job). Since he's used your domainname to send the mail, the They send an NDR ('bounce message') back to the sender. Header, and so they treat his message the same as any other message that cannot be delivered. These servers cannot tell that he forged his Or for some other reason, delivery failed. The spammer either used a bad address, or was blocked, Which are sent to you by the servers the spam was sent to. He does this because he thinks it will give him a better chance of having his spam delivered.Ī side-effect of this is that you get the bounces, that is, the non-delivery reports (NDRs), So that it seems the spam comes from your domain. The person responsible is forging his mail header Occasionally, the cause is a malicious attacker - but this is rare. Your address and/or server may be blacklisted.Įxplanation: A spammer is the most likely cause.

The FROM address in the original message is the email address which receives the bounce messages. The original messages, which are sometimes contained within (or attached to) the bounce, theyĪre spam, and you didn't send them, and you've never heard of the people they were addressed Of 'bounce' messages from MAILER-DAEMON, Postmaster, System Administrator, etc. Problem: Your inbox has filled and/or is filling, with hundreds or thousands My mailbox is flooded with bounces from MAILER-DAEMON, help!

Email bounce back message cannot be delivered encrypted