hi, kinda new, but i think this subject goes in this forum

i was wondering how to make ( not if we can make ) a prog or something that we can attach to a mail and that tells us xxx has received ur mail xxx has read ur mail .....

i think there are similar things done and being used with greeting cards like 123greetings.com
( not marketing them... first name into my head)

so if u can help me figure out the principals, i will be 10xful
don't tell me to google cuz my screen (monitor) is burned i can hardly see, but keeping the work on

that's it

preffered programming lang : c , vb 6.0