If you're looking for a reliable, commercial, 100% java SMTP server, that you can extend and customise to your heart's content - then we have a solution for you.

We use some really good development tools and I can highly recommend them to anyone out there building .NET smart clients.  Developer Express ( www.devexpress.com ) provide the best UI components that I've ever found.  Fully functional UI components that look great and also work like a dream.  I can highly recommend them.  I can also highly recommend XmlPdf ( www.visualprogramming.com ).  Built here in New Zealand, its a very powerful tool for building PDF documents and we use it for all of our PDF reports - some of which are fairly complicated but look great. 

A lot of our customers want to track links, such as www.calcium.co.nz  - where the advertised url is also the underlying link.  The problem is that this requires us to change the underlying url to be a redirect url - which means that you advertise www.calcium.co.nz to the reader - but they click-through to a completely different url and then get redirected to the target link.  This may seem pretty simple - but its also called Phishing and more and more spam filters are on the look out for mis-direction like this because its a pretty obvious case of mis-leading the reader and therefore, it's bad.

1. Make use of your domain names