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POP3 and IMAP4
IMAP4
IMAP4 and POP3
Internet Messaging Access Protocol 4 (Netscape)
Internet Message Access Protocol (commonly known as IMAP or IMAP4,
993
IMAP4
If it is previous before you enter this, no. But if you go to Edit:Setting there is a tab for Archives. Click that, then check off the two boxes. After, you have to select where you want the messages to be saved. It will keep an archive or your messages.
Some email servers can be accessed via POP3 (or IMAP4). You can install an email client, and access any of these, as long as they have the option to configure POP3 or IMAP4. Or you can configure a Web-based email system, to get email from other accounts. Once again, this assumes the servers you want to access have the option to access either via POP3 or via IMAP4. I am not entirely sure which servers have this option; GMail does, but I am not sure about the others.
application layer
i. flags can be used to classify mails ii.folders in maibox can be creadted or deleted. iii.messages can be filtered. iv.massage can be read before download.