I am using your dll and would want to know, is there a way to get number of emails or all the details during a specific period. This is a pop3 mailbox. Thanks
This is not possible using POP3 protocol. This protocol doesn't offer any kind of searching capabilities.
Please note that this is the limitation of the protocol itself not Mail.dll component.
Consider switching to IMAP, it shouldn't be hard as the API is similar in many cases. IMAP offers much more options searching included (https://www.limilabs.com/blog/how-to-search-imap-in-net ).