If you already have a mailbox at another provider and want to retrieve your emails there, you can forward your emails to this mailbox (e.g. firstname.lastname@example.org).
Login to your customer area and click "E-mails" in the left navigation bar.
If you have more than one domain, select the domain in the pulldown-menu for which you want to setup a redirect in a mailbox.
Click "Edit" at the mailbox, you want to setup a redirect for.
Enter the mailadress your mailbox should be forwarded (e.g. email@example.com).
Note: Use the hook, to store a copy in the mailbox, to archive the mails at the same time.
Confirm you entries by click on the button "Save".
Send an email