To switch off black lists for all your domains, simply create an empty directory, within your home directory, called by the following pathname:
.spamcontrol/dnsblIn other words, within your home directory create a subdirectory called ".spamcontrol" and within that subdirectory create another directory called "dnsbl". As soon as you do this, no more black lists will be used for any of your domains.
After switching off black lists as above, you can selectively re-enable them for any of your domains by creating a file with the same name as the domain name within your ".spamcontrol/dnsbl" directory. For example, suppose you wish to switch on black lists for a domain "example.com". To do this, create a file whose name relative to your home directory will be:
.spamcontrol/dnsbl/example.comUse all lowercase letters in the above filename. If you use any uppercase characters in the filename, the resulting filename will have no effect on black list use.
The directories and files above should be world-visible, i.e., the mail system should be able to test for their existence even if it runs as some username other than yours.
The rule used by the mail system for deciding whether or not to use black lists can be algorithmically stated as follows. Suppose mail arrives for you and the domain in the destination address is "example.com". Then:
look within the user's home directory if a directory called .spamcontrol/dnsbl DOES NOT exist then black lists will be used else if a file called .spamcontrol/dnsbl/example.com DOES exist then black lists will be used else black lists will not be used end ifIf you have encountered any spam problems, we recommend that you allow black lists to remain active for your domains.
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