Dada Mail is written by reading a lot of books and experimenting. Here's a few books that I read along the way that I suggest to you:
Dada:
art and anti-art
Understand the "Dada" in Dada Mail
Effective
Perl Programming
If I could only have one book on Perl, it would be this book; easy
to read, filled with examples, small and not so pricey.
The
Perl Cookbook
My savior in programming Perl more than a hundred times, a book chock full
of real life examples - a great way for me to learn.
Programming
Perl
A good reference to have around for all the nitty gritty stuff, but not something
to use to learn the language from.
Learning
Perl
Admittantly, I learned Perl much to with the help of this book
Mastering
Algorithms With Perl
A very good book when you start thinking of performance issues.
Network
Programming in Perl
Gets a little more lower level in network programming than most Perl books.
Web
Design in a Nutshell
One of the first Web Design books I ever picked up.
Cheap
Web Tricks
Honorable mention here for mentioning the then, Mojo Mail
Dada Mail is Free Software and is released under the Gnu
Public License.
Dada Mail is written in Perl because we love Perl.