SVN commit 1133038 by link:

If the default encryption setting is SSL, then the default port should
match.

 M  +1 -1      imapresource.kcfg  


--- trunk/KDE/kdepim/runtime/resources/imap/imapresource.kcfg #1133037:1133038
@@ -11,7 +11,7 @@
     </entry>
     <entry name="ImapPort"  type="Int">
       <label>Defines the port the IMAP service is running on</label>
-      <default>143</default>
+      <default>993</default>
     </entry>
     <entry name="UserName" type="String">
       <label>Username</label>