AspMail can support any encryption program that uses command-line parameters. Using PGPPath and PGPParams you can specify input, output and processing options. The current version of PGP (5.0) does not support command-line parameters but the commercial PGP 4.x does as well as the freeware (non-commercial use) PGP 2.6.2.
Here is a COM tutorial written for Active Server Programmers. This tutorial will increase your understanding of COM fundementals so that you can use other components to expand your Active Server page applicatons.[Read The Tutorial]