Hi, I have set up postfix to deliver to virtual users using mysql for a number of domains on one machine. This works great when this machine is the final destination for a specific domains emails, and has been working great for months. The problem is that one of domains hosted on the machine has their mail hosted by an ISP in POP3 mailboxes, and they don't want that to change. So, I have set up fetchmail that retrieves the emails from a server and forwards it to postfix, and no problems. The users can send and receive emails without issue. The problem is that they have a few remote users that use the POP3 accounts and retrieve mail directly from them. These users aren't part of my fetchmail / postfix config, sooooo... when one of the internal users tries to send a mail to one of the remote users, it obivously can't find the remote user in the virtual lookup table, and dies. So, my question is... is there a way that I can force Postfix to send emails to a remote SMTP server for certain email addresses with the same domain as my Postfix server... If not, has anyone done something like this before? Any suggestions?