MailScanner Ubuntu and Debian packages

September 10, 2012 at 07:39 AM | categories: Sysadmin, Security, Email, Linux | View Comments
The Debian and Ubuntu MailScanner packages have not been maintained for a long time. Recently both distributions dropped support for MailScanner within their repo's. The Baruwa project provides up to date deb packages for both distributions. Packages are available for:...
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Disable a ClamAV signature

August 10, 2012 at 07:30 AM | categories: Tips, Email | View Comments
There are cases when you need to disable a ClamAV signature for various reasons. To do this create a file with the extension ".ign2" in your ClamAV data directory with the name of the signature. cat > /var/lib/clamav/mb.ign2 << 'EOF'...
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How to fix Exim SMTP AUTH rewritting the from address

June 08, 2012 at 07:55 AM | categories: Tips, Exim, Email | View Comments
When using SMTP Authentication with exim and the default configuration you will find that exim rewrites the sender address to "email@address"@smtp_server_hostname Return-Path: <"andrew@topdog.za.net"@xxxx.xxxx.co.za> ... Sender: "andrew@topdog.za.net"@xxxx.xxxx.co.za ... To fix this you need...
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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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MailScanner book now free

May 01, 2012 at 12:39 PM | categories: Sysadmin, Security, Email, Linux | View Comments
Julian Field the author of MailScanner and the of the MailScanner book has just announced that the MailScanner Book is now available for free. So head off and get your copy....
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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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Mail server setup with Exim, MySQL, Cyrus-Imapd, Horde webmail on Centos 5.1

March 04, 2009 at 12:37 PM | categories: Horde, Centos, Howto, Exim, Cyrus, Linux, Email | View Comments
This how to describes the installation and configuration of a mail system on Centos 5.1 with selinux enabled for enhanced security. This system will be able to service HTTP, HTTPS, SMTP, TLS, SMTP-AUTH, IMAP, POP3 clients and is virtual...
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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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CENTOS 5 virtual hosting howto

February 03, 2008 at 06:58 PM | categories: Horde, Centos, Howto, Exim, Cyrus, Linux, Email | View Comments
This tutorial shows how to set up a CentOS 5.x server to offer all services needed by virtual web hosters. These include web hosting,smtp server with (SMTP-AUTH and TLS,SPF,DKIM,Domainkeys),DNS,FTP,MySQL,POP3/IMAP,Firewall,Webalizer for stats. I will use the following software: Database...
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