--- a/doc/installation.txt	Wed Oct 04 03:52:36 2006 +0000
+++ b/doc/installation.txt	Wed Oct 04 09:43:06 2006 +0000
@@ -533,6 +533,11 @@
 
     echo test |mail -s '[issue] test' support@YOUR_DOMAIN_HERE
 
+Be careful that some mail systems (postfix for example) will impost a
+limits on processes they spawn. In particular postfix can set a file size
+limit. *This can cause your Roundup database to become corrupted.*
+
+
 As a custom router/transport using a pipe process (Exim4 specific)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~