A couple weeks ago, in order to accommodate local users (not) receiving mail messages written by some Outlook/Exchange correspondants (Message-Id gets re-used...) I disabled Cyrus duplicate suppression by adding the following line to my imapd.conf : duplicatesuppression: 0 Somewhat naively I thought that Cyrus wouldn't be writing the duplicate delivery database anymore, but this is not the case. Is there, other than by patching the C code, a way to disable writing delivery.db ? This is a Cyrus 2.2 system, upgrading to 2.3 this summer. Regards, Eric Luyten, Computing Centre VUB/ULB. ---- 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