Sriharsha, you are right. That's the hardware connection to the modem and the rest is software.

The software is going to be some work, though. To get SMTP, which is a TCP/IP protocol, over the modem you're going to have to get TCP/IP working. For TCP/IP to work over the modem, you need to implement SLIP or PPP. Only when both SLIP/PPP and TCP/IP are implemented will you be able to write an SMTP client that uses those protocols to communicate via a modem.

An easier way, if it's an option, is for the 8052/modem to connect to a server that ANSWERS with SMTP protocol. I.e., instead of connecting to SMTP via TCP/IP port 25 you could just dial a phone number, the server would answer, and send an SMTP "220 servername ESMTP Sendmail Ready" prompt and you could issue SMTP commands in ASCII. But if you have to do it via TCP/IP you're going to have to do everything mentioned above.

Regards,
Craig Steiner