diff -Naur cyrus-imapd-2.3.16.orig/doc/install-configure.html cyrus-imapd-2.3.16/doc/install-configure.html
--- cyrus-imapd-2.3.16.orig/doc/install-configure.html	2008-01-07 18:56:09.000000000 +0100
+++ cyrus-imapd-2.3.16/doc/install-configure.html	2010-07-28 08:36:40.000000000 +0200
@@ -193,8 +193,8 @@
    imaps     993/tcp
    pop3s     995/tcp
    kpop      1109/tcp
-   sieve     2000/tcp
    lmtp      2003/tcp
+   sieve     4190/tcp
    fud       4201/udp
 </pre>
 
diff -Naur cyrus-imapd-2.3.16.orig/doc/install-sieve.html cyrus-imapd-2.3.16/doc/install-sieve.html
--- cyrus-imapd-2.3.16.orig/doc/install-sieve.html	2001-10-23 20:14:48.000000000 +0200
+++ cyrus-imapd-2.3.16/doc/install-sieve.html	2010-07-28 08:37:57.000000000 +0200
@@ -85,7 +85,7 @@
 <li>Next test authenticating to the sieve server. To do this run the
 "<tt>sieveshell</tt>" utility. You must specify the server.  If you
 run this utility from a different machine without the "sieve" entry in
-"/etc/services", port 2000 will be used.
+"/etc/services", port 4190 will be used.
 
 <pre>
   "<kbd>sieveshell foobar</kbd>"
diff -Naur cyrus-imapd-2.3.16.orig/doc/text/install-configure cyrus-imapd-2.3.16/doc/text/install-configure
--- cyrus-imapd-2.3.16.orig/doc/text/install-configure	2009-12-21 14:18:00.000000000 +0100
+++ cyrus-imapd-2.3.16/doc/text/install-configure	2010-07-28 08:37:37.000000000 +0200
@@ -152,8 +152,8 @@
            imaps     993/tcp
            pop3s     995/tcp
            kpop      1109/tcp
-           sieve     2000/tcp
            lmtp      2003/tcp
+           sieve     4190/tcp
            fud       4201/udp
 
     12. Remove "/etc/[x]inetd.conf" entries. Any imap, imaps, pop3, pop3s,
diff -Naur cyrus-imapd-2.3.16.orig/doc/text/install-sieve cyrus-imapd-2.3.16/doc/text/install-sieve
--- cyrus-imapd-2.3.16.orig/doc/text/install-sieve	2009-12-21 14:18:00.000000000 +0100
+++ cyrus-imapd-2.3.16/doc/text/install-sieve	2010-07-28 08:37:00.000000000 +0200
@@ -64,7 +64,7 @@
      3. Next test authenticating to the sieve server. To do this run the
         "sieveshell" utility. You must specify the server. If you run this
         utility from a different machine without the "sieve" entry in
-        "/etc/services", port 2000 will be used. 
+        "/etc/services", port 4190 will be used. 
 
           "sieveshell foobar"
             Please enter your password: ******
diff -Naur cyrus-imapd-2.3.16.orig/perl/sieve/lib/isieve.c cyrus-imapd-2.3.16/perl/sieve/lib/isieve.c
--- cyrus-imapd-2.3.16.orig/perl/sieve/lib/isieve.c	2009-02-16 19:18:10.000000000 +0100
+++ cyrus-imapd-2.3.16/perl/sieve/lib/isieve.c	2010-07-28 08:35:42.000000000 +0200
@@ -616,7 +616,7 @@
     } else {
 	serv = getservbyname("sieve", "tcp");
 	if (serv == NULL) {
-	    port = 2000;
+	    port = 4190;
 	} else {
 	    port = ntohs(serv->s_port);
 	}
diff -Naur cyrus-imapd-2.3.16.orig/perl/sieve/managesieve/managesieve.xs cyrus-imapd-2.3.16/perl/sieve/managesieve/managesieve.xs
--- cyrus-imapd-2.3.16.orig/perl/sieve/managesieve/managesieve.xs	2009-01-14 16:50:47.000000000 +0100
+++ cyrus-imapd-2.3.16/perl/sieve/managesieve/managesieve.xs	2010-07-28 08:35:30.000000000 +0200
@@ -241,7 +241,7 @@
       /* map port -> num */
       serv = getservbyname("sieve", "tcp");
       if (serv == NULL) {
-	  port = 2000;
+	  port = 4190;
       } else {
 	  port = ntohs(serv->s_port);
       }