[Mimedefang] SpamAssassin DnsResolver.pm problem with Embedded Interpreter

[David Eisner]

I setup Mimedefang 2.55 with SpamAssassin 3.1.0 on a non-production 
Centos 3.6 Linux box.  The machine in question has only 128MB of RAM, so 
I'd like to get the embedded interpreter working.  Also, this is how the 
production version will be configured (not the 128MB RAM part, though :-).

When I turn on the embed flag, I have two problems.

1. mimedefang-multiplexor[24534]: WARNING: Something in your Perl filter 
appears to have opened a file descriptor outside of any function....

2.  mimedefang-multiplexor[24534]: Slave 0 stderr: dns: sendto() 
failed:  at 
/usr/lib/perl5/site_perl/5.8.0/Mail/SpamAssassin/DnsResolver.pm line 320.
mimedefang-multiplexor[24534]: Slave 0 stderr: dns: select failed: Bad 
file descriptor at 
/usr/lib/perl5/site_perl/5.8.0/Mail/SpamAssassin/DnsResolver.pm line 347.
last message repeated 8451 times

If I disable SpamAssassin, problem 1 (and of course problem 2) goes away.

Perhaps something in SpamAssassin is opening a descriptor during 
initialization.  I tried creating a filter_initialize sub in 
mimedefang-filter, with

   eval "use Mail::SpamAssassin;";

in it, but that didn't help. 

Any ideas?

-David