On Aug 3, 2009, at 2:07 AM, Don Muller wrote:

I use Dovecot and XMail on a QNAP TS-509 NAS. QNAP has combined the
two into a package they call XDove. Everything seems to be working great except
for one thing. When Dovecot retrieves the mail from XMail it is not
removing it from XMail. It is leaving a copy on XMail. Is there an option I can set
in Dovecot so it will delete the mail message from XMail when it retrieves it.

Dovecot doesn't retrieve mails. It sounds like something's retrieving
mails from XMail via POP3? I've no idea what that is, but it's not
Dovecot.