Nikolaus Rath schrieb: > But unless I have some exotic filtering and/or rate limiting configured, > he can do exactly the same thing by connecting to localhost:smtp, or > invoking sendmail directy, can't he? So why the additional protection > for lmtp? Imagine a Cyrus Box only accepting LMTP connections, no sendmail, no Postfix, no other SMTP MTA running on it. Then imagine a frontend smtp relay delivering directly via LMTP over TCP to your Cyrus box. You can use lmtp auth then to prevent other machines from directly delivering mails via lmtp. Pascal -- Pascal Gienger University of Konstanz, IT Services Department ("Rechenzentrum") Electronic Communications and Web Services Building V, Room V404, Phone +49 7531 88 5048, Fax +49 7531 88 3739 ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html