The settings are accessed through Tools > Internet options.

Notice the tabs labeled "Receiving (POP3)" and "Sending (SMTP)".  Each one opens a window within which you can create host files by using the "Add" button.  A host file is simply a file that contains the relevant information for connecting to an email host.  A POP3 connection is different from an SMTP connection so each must have its own host file even though it's connecting to the same host.

The simplest form is connecting to one host, retrieving via POP3 and sending via SMTP.  In this case, you would need one POP3 host file, which would be created through the "Receiving (POP3) tab, and one SMTP host file, created through the "Sending (SMTP)" tab.

There is a lot of information available through the Help button in the Internet options window.

I've set up pegasus mail, but I cannot access my gmail. I followed all the instructions I found, but the message seems to be that pegasus cannot log in to the gmail server.

See this post. Although it's ten years old it might still be valid.

Have you enabled POP3 and/or IMAP in Gmail's configuration?

You must do it from within the Gmail web interface.  I can't figure out how to navigate to that setting page from within the current Gmail "myaccount" interface but if you login and then browse to the URL provided below it will open the settings page where you can enable POP3 and/or IMAP.

 https://mail.google.com/mail/u/0/#settings/fwdandpop

That link is invalid.
I was referring to the first post, from Germany, not the second post..... sorry.

[quote user="Margaret Berson"]That link is invalid.
I was referring to the first post, from Germany, not the second post..... sorry.[/quote]

Corrected now - or simply try this one.

Thanks, but I do not see WHERE to put all that information. The screens I've looked at only have space for the pop and smtp address, not for all that other information. Where should I be looking??