Warning opening bounce test email

I've set up and configured the e-Newsletter plugin for SMTP. When I click the button Test Connection, a test email is sent to the bounce email account, but I get this warning message when the plugin tries to read it:

<b>Warning</b>: imap_open() [function.imap-open]: Couldn't open stream {pop.gmail.com:995/pop3/notls}INBOX in <b>/home/aidemocr/genglobal.org/wp-content/plugins/e-newsletter/e-newsletter.php</b> on line <b>1125</b>
Connection failed to gmail-pop.l.google.com,995: Connection timed out

We use Gmail to handle our email addressed at our domain name. I've set the POP3 server to pop.gmail.com with a port of 995, which are the same settings that work in MS Outlook. The username is the full email address and the p/w is correct.

Anyone have any suggestions on why the bounce email can't be opened by the plugin?