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Tag Archives: blacklist

July, 2010

  • 16 July

    How to Fix an Open Relay in Postfix

    postfix

    As I have been reiterating all week, an open relay is a bad idea. If your mail server is left open, anyone can use your SMTP service to send mail, and spammers will use it. This can result in your server being blacklisted and extraneous use of system resources that …

May, 2010

  • 17 May

    When You Are Accused of Spamming…

    Question: My web host has accused me of being a spammer and has suspended my account. How do I prove I am not a spammer? Answer: Usually, you will only be accused of spamming in one of three situations: (1) you actually are a spammer, (2) your account is hosted …

January, 2010

  • 6 January

    What is DNSBL and should I care about it?

    Question: What is DNSBL and should I care about it? Answer: DNSBL stands for DNS Block List or Blacklist. Essentially, it is a published list of ipp addresses that are in some way connected to spam. Although the most common form of DNSBL is a list of actually servers and/or …

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