I just set up the email client in OpenGoo with exactly the same information (POP and SMTP) as in my current webmail client.
It retrieved only 18 of several hundred messages already in my Inbox.
Subsequent emails are not retreived either. When pushing the "Check email accounts" button, the part of the interface that belongs to the email tab just turns grey.
Finally, when trying to send email, I get this error message:
Error -1: transaction aborted.