Send Mail with Visual Basic

We have a Citrix server setup? running a Visual Basic 6.0 program? remotely using tough books.? We want to be able to send emails from our VB 6.0 program. We have an Mail? Exchange server setup. There is no mail service installed so you cannot use MAPI. I have tried using Winsock and CDO with no success. ## Deliverables * * *This broadcast message was sent to all bidders on Friday Mar 21, 2008 7:04:34 PM: We are using MS Exchange Server so I don't believe we have a SMTP server. Nor do we have a an mail service. * * *This broadcast message was sent to all bidders on Sunday Mar 23, 2008 1:22:05 PM: All I had to work with is the SEND Server Name, the username and password. Can you make it work in VB 6.0? * * *This broadcast message was sent to all bidders on Monday Mar 24, 2008 3:09:49 PM: OK so I just found out that the client I am designing for is behind a firewall. This explains why I cannot connect to their SMTP service. Only the POP3. Only people within their offices can connect. This means I have to develop the code and have them test on their end. SO I need a solution which allows for the fact that I cannot connect and test from my end. So given that we still have the Send Server, username and password but it is behind a firewall who all is still in for the project? * * *This broadcast message was sent to all bidders on Monday Mar 24, 2008 3:23:22 PM: I haven't mentioend this yet but I will need to send attachnments. Pdf files and Word files. Let me know also if you have an environment where I can test your submission?