To all, I've been working on getting sendmail and sieve to play and have yet to get things to work. I am running Cyrus Imapd-2.0.12 KTH Krb4 1.0.5 SASL 1.5.24 Solaris 8 ( 64 BIT Mode ) Sendmail 8.11.3 I've tried using the cyrusproto.mc that comes with sendmail and the cyrusv2.mc that came with the cyrus distribution. I've also been trying various changes to the above with no luck. I am trying to run sieve on the server side. The two main error I see are sendmail (/usr/cyrus/bin/deliver ) exited with EX_TEMPFAIL and/or reply: read error from local host Any suggestion, .mc files, etc appreciated as this is the last major functionality I need to get enabled.