No Ndr In Sendmail

• Such records may have special meanings for a particular mail service and may not used or understood by other mail services; for this reason, they are considered "experimental" header lines, and not standard features of smtp.
• but they do not mind others using it as long as you keep it lowercase.
• Spammers are able to forge some, but not all, of these records.
• Spam tip: Does the spammer call you by your name? The answer is no if it is spam.
• There are black hole lists (dns-based) of known spammers, as well as email addresses that are not intended to be used except to capture spam (spamtraps) which offer more intermediate ways to combat the problem at the computer user level.
• Free internet services such as deja-news, or internet services with free trial periods such as aol, are favorites of spammers, as it costs nothing to acquire an account with an email address, and to lose the account is meaningless to them.
• To manipulate a string of data so that it can no longer be understood properly by machines, although it may still be recognizable to humans, is called munge.
• CAN SPAM Act 2003 - Controlling the Assault of Non-Solicited Pornography And Marketing.
• These logs are not only a useful tool for web site statistics and maintenance, but in tracking spambots as well.
• Spam is not only limited to one medium only, spam is a much bigger problem than most people realise.
• A message bounce is when a mail delivery agent notifies the sender of an e-mail message using the return-path address of the message, that the message cannot be delivered because its for-address is not valid, or is incapable of receiving the mail.
• A blacklist is a list of e-mail addresses from which a user does not wish to receive mail; it may be used as part of a spam filter to hide or discard messages from addresses that appear on the list.
• Blacklists are not a terribly effective form of spam filter as they usually do not block or reject e-mail as much as merely route it to some destination of the user's choice (like the trash can).
• Any emails that are not in your whitelist, will be sent to spam inbox.

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