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Courier and SPF

Date: 23 February 2005

Categories: courier, SPF

SPF is a protocol to try to provide some defense against domain spoofing. You can turn on SPF checks in courier-mta by adding various things to bofh. You might want to begin by reading the SPF RFC and the Courier SPF docs. Possible Keywords (descriptions from the RFC): Keyword Description “none” A result of None means that no records were published by the domain.

How to Allow Users to Login with user%domain

Date: 22 February 2005

Categories: courier, mysql

Like many people, I setup courier to use mysql for authentication. When I went through the setup, I decided to store username as user@domain in the accounts table. Users who are not in the default domain, can login as user@domain and they are good to go. This works well in most modern email clients, but some older clients, notably Netscape 4.5, can’t use this syntax and are unable to login.

Using AMaViS-ng with Courier

Date: 22 February 2005

Categories: amavis, courier

Note: I have switched to amavisd-new. These docs should still work but I am no longer maintaining them. See Courier with Amavisd-new. These intructions walk you through the setup of AMaViS-ng with the F-Prot virus scanner from Frisk. It should be fairly trivial to use another virus scanner, such as clamav, instead. Needed Ports archivers/lha archivers/unarj or archivers/arj archivers/unrar or archivers/rar archivers/zoo or archivers/unzoo archivers/arc archivers/p5-Compress-Zlib archivers/p5-Archive-Tar archivers/p5-Archive-Zip archivers/bzip2 devel/p5-IO-stringy converters/p5-MIME-Base64 converters/p5-Convert-UUlib converters/p5-Convert-TNEF mail/p5-MIME-Tools mail/p5-Mail-Tools devel/p5-Config-IniFiles devel/p5-File-MMagic sysutils/p5-Unix-Syslog F-Prot You need to install wget (ftp/wget) and unzip (archivers/unzip) for check-updates.

Using RBLs With Courier

Date: 22 January 2005

Categories: courier, rbl

Real-time Blacklists (RBLs) are commonly used to block mail from known spammers or servers that can be used to send spam (open relays and the like). I found a lot of good info on setting up rbldnsd here. I use Bind 9 on my DNS servers so that I can run rbldnsd on the same IP as bind. Note: Setting up and configuring Bind 9 for basic DNS is beyond the scope of this document.