--- a/dovecot-example.conf	Wed Dec 15 21:31:06 2004 +0200
+++ b/dovecot-example.conf	Wed Dec 15 22:05:15 2004 +0200
@@ -444,6 +444,25 @@
   # from new ones. Some clients still wish to use this though. Enabling this
   # makes RSET command clear all \Seen flags from messages.
   #pop3_enable_last = no
+  
+  # POP3 UIDL format to use. You can use following variables:
+  #
+  #  %v - Mailbox UIDVALIDITY
+  #  %u - Mail UID
+  #  %m - MD5 sum of the mailbox headers in hex (mbox only)
+  #
+  # If you want UIDL compatibility with other POP3 servers, use:
+  #  UW's ipop3d         : %08Xv%08Xu
+  #  Courier version 0   : (maildir filename, not supported)
+  #  Courier version 1   : %u
+  #  Courier version 2   : %v-%u
+  #  Cyrus (old)         : %u
+  #  Cyrus (new)         : %v.%u
+  #
+  # Note that Outlook 2003 seems to have problems with %v.%u format which is
+  # Dovecot's default, so if you're building a new server it would be a good
+  # idea to change this. %08Xu%08Xv should be pretty fail-safe.
+  #pop3_uidl_format = %v.%u
 
   # Support for dynamically loadable modules.
   #mail_use_modules = no