Gmail's POP3 access requires SSL.

In order to use POPFile's SSL support you need to add ':ssl' to the end of the username in Outlook (i.e. change it to incoming_mail_server:old_username:ssl) otherwise POPFile will be unable to connect to Gmail. Note that in this case Outlook must NOT be configured to use SSL support because the SSL connection will be made between POPFile and Gmail instead of between Outlook and POPFile.

Alternatively you can decide to use Avast's support for SSL POP3 connections instead of using POPFile's SSL support (which means ':ssl' is NOT added to the end of the username in Outlook). Note that in this case Outlook must NOT be configured to use SSL support because the SSL connection will be made between Avast's mail scanner and Gmail instead of between Outlook and POPFile.

It is not clear from your report which of these two approaches you are trying to use.

Have you checked that POPFile is still running? If POPFile is not running then Outlook will not be able to connect to the incoming mail server.

On Windows systems there is an easy way to discover if POPFile has a problem when Outlook tries to check for new email - shut down POPFile and then use this Start Menu shortcut to start POPFile and display some status messages:

Start -- All Programs -- POPFile -- Support -- Message Capture utility

This shortcut displays some POPFile start up messages which are normally hidden; once the "POPFile Engine v1.1.3 running" message appears POPFile is ready to handle requests from Outlook.

If an error is detected the Message Capture utility's window should show one or more error messages which can be copied and pasted into a forum reply.