Block Spam from domains on the South Africa ISPA Spam Hall of Shame using DNSBL Part2

May 11, 2012 at 07:30 AM | categories: Postfix, Tips, Exim, Email, Linux | View Comments
I previously wrote about how to block domains named in the ISPA Spam Hall of Shame using DNSBL at SMTP time, these domains have now resorted to using 3rd party senders to try and get their Junk through. Because they...
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Setup DKIM on Postfix with OpenDKIM

April 29, 2012 at 06:50 AM | categories: Postfix, Howto, DKIM, Centos, Email | View Comments
DKIM is an authentication framework which stores public-keys in DNS and digitally signs emails on a domain basis. It was created as a result of merging Yahoo's domainkeys and Cisco's Identified Internet mail specification. It is defined in RFC...
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TIP: Block Spam from domains on the South Africa ISPA Spam Hall of Shame using DNSBL

April 22, 2012 at 09:30 AM | categories: Postfix, Howto, Exim, Email, Linux, Tips, Security | View Comments
The South Africa Internet service providers association (ISPA) maintains a list of known spammers dubbed the Spam Hall of Shame. The list is contains both domains as well as email addresses, this list is published on a webpage without downloadable...
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Setup DKIM on Postfix with dkim-milter

March 10, 2009 at 11:54 PM | categories: Postfix, Howto, DKIM, Centos, Email | View Comments
DKIM is an authentication framework which stores public-keys in DNS and digitally signs emails on a domain basis. It was created as a result of merging Yahoo's domainkeys and Cisco's Identified Internet mail specification. It is defined in RFC...
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Setup Postfix to sign and verify Domainkeys email

March 10, 2008 at 11:54 PM | categories: Postfix, Domainkeys, Howto, Email, Centos | View Comments
Domainkeys is DomainKeys is a method of e-mail authentication. Unlike some other methods, it offers almost end-to-end integrity from a signing to a verifying Mail Transfer Agent (MTA). In most cases the signing MTA acts on behalf of the...
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Creating a Cacert postfix certificate

February 03, 2008 at 06:58 PM | categories: Postfix, SSL, Security, Linux | View Comments
Cacert is a certification authority that provides free certificates, i guess using them is much better that having your own local CA. We need to download the cacert root certificate and install it on the server Download and...
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