Question: how can  know whether someone's email id has expired or not when that id doesnt respond? can i know about a person by his id???

Answer: There is a program called yahoo intai, search it with the help of google. It reveals hidden yahoo messenger users if they r trying to hide. There is also a validation option that it has got, that validates whether the messenger exists or not. The emails will be bounced back to u if they r not able to reach the expired id.
This question from the Yahoo Q&A forum is categorized in the topic: Health