> -----Original Message-----
> In an application I have to send an email containing a Credit 
> Card number, but I don't know how to secure it!!!
> 
> Is there a ruby library or best practice for securing an 
> email content, I googled for it with no success.

There's a perl CGI called Soupermail that does this.  It uses a shell
exec call to PGP to encode a temporary file that contains the
information, then attaches that file to the email, or something like
that.

If you're looking for something, you could either use that, or use it as
an example.  I've used it several times on a number of consulting
projects, and it works great, so... Hope this helps :)

-Doug