>Hi all,
>
>we're building a web app here (ASP.NET 2.0) and using the file system web server (cassini). We have some functionality in there to send out some emails. When we started this project, we were using IIS, and eventually switched to Cassini. When we were using IIS, the code that sends emails through smtp used to work fine, but it just quit working after we switched to using Cassini.
>
>Any ideas there?

AFAIK Cassini doesn't support SMTP.
From http://msdn2.microsoft.com/library/58wxa9w5(en-us,vs.80).aspx

"... For example, the ASP.NET Development Server does not support an SMTP mail server. If your Web application involves sending e-mail messages, you must have access to the IIS SMPT virtual server to test e-mail because the ASP.NET Development Server cannot forward e-mail messages or invoke a server that does."

Cetin