What is Sorbs SMTP about:
List of SMTP Open Relays. Proxy Databases (HTTP/SOCKS & Misc): SORBS is an acronym for "Spam and Open Relay Blocking System" although this is not strictly accurate since SORBS also lists Open Proxy servers and machines that appear to be hacked sources of spam. Listing is semi-automatic and manual. This is due to the fact that correctly identifying an open relay is not always possible with automatic methods.
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