server spam filter
server spam filter thoughts for 12.31.1969
- Spam email can be used to flood a mail server, performs a denial of service (dos) attack, makes the destination server freeze or suffer for low performance.
- So unsolicited email sent to a spam trap is no doubt spam and will cause mark the sending server as a spam source.
- Some spammers create virus-like or worm software that can be installed on your computer and swipe the info in your address book back to a spam server that will collect them.
- Local name servers get their info from the authoritative name servers for each domain, and usually retain this information for a time in their cache (memory) before "refreshing" it with another authoritative lookup.
- Beacon urls usually take the form of invisible images or undefined anchors that have clear or encrypted data appended to them; the data will show up in the spammer's web server logs or private databases when the link is fetched.
- The relay feature is a part of all smtp-based servers and it has legitimate uses, but spammers have learned how to locate unprotected servers and hijack them to send spam.
- Web server logs are usually maintained in a special directory outside those of the website(s) handled by the server.
server spam filter
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