vacation not working

[eric smith]

Hi All,

built a cyrus/postfix/squirelmail server behind dmz with name  
xyz.foo.bar and during testing vacation worked just fine when using  
squirlemails vacation filter. But after moving it into the dmz and  
changing the name to mail.foo.bar vacation stopped working. so the  
changes are diff ip and diff alias. THe FQN is still xvz.foo.bar and  
the dns aliases mail.foo.bar to xyz.foo.bar. These changes are  
reflected in an internal DNS but not an external DNS. The external  
DNS only lists mail.foo.bar. What is strange is that all other sieve  
functions work, redirect et all only vacation. To further hamper  
finding out what is going on, nothing appears in the logs, no  
failures and nothing is in the postfix queue. It seems that the  
vacations messages are going to /dev/null.

So has anyone else had this problem, and what was their fix?

Best

Eric