Hi Marcos, Do you want to Send Mails or Recieve Mails. When you send mails, you use SMTP. POP3 is used for recieving emails. This clears and solves your first sentence of your posting. Regarding your doubt regarding .NET Framework classes to send mails, check out System.Web.Mail (It has an exhaustive collection of classes and methods to send mail) Check out http://www.c-sharpcorner.com/ for some code snippets in checking mails using POP3.) deepak Deepak Kumar Vasudevan http://deepak.portland.co.uk/