Fetch and read email messages with attachments from GMAIL POP3 mail server in every minute in ASP.Net

As per the meta tag i have checked the page is refreshed at the specified interval and the if (!IsPostBack) condition is executed. So try insert debuger and check this condition. It is not possible to check your code remotely.

It will fetch only new unread emails, Mails once fetched won't be refetched.

This is POP3 and this is how it works.