Hi, we are trying to migrate to Zimbra Open Source Edition.

Our IP and subnet of class C (!) is blacklisted.
ISP does not provide a mail relay and we do not have another ISP.
End users must work with Zimbra via web interface.

So the only way to get emails delivered is to
connect Zimbra server to mail server of our hoster via POP/SMTP.

Is there such options in Zimbra to fetch emails via POP3 and send via SMTP.

Hoster allows to use the same account (postmaster@oursite.com) for outgoing emails from all *@oursite.com addresses.

Thanks in advance.

I can not believe that nobody else has the same problem with IP and ISP.