--- amavisd-new~	2007-09-08 17:15:07.000000000 -0600
+++ amavisd-new		2007-09-08 17:16:22.000000000 -0600
@@ -2459,5 +2459,6 @@
   $received =~ s/\n([ \t])/$1/g;  # unfold
   $received =~ s/[\n\r]//g;       # delete remaining newlines if any
-  my(%fields);
+  $received =~ s/[ \t]+/ /g;      # compress whitespace as a quickfix/bandaid
+  my(%fields);                    #   for deep recursion in regexp evaluation
   while ($received =~ m{\G\s*
             ( \b(from|by) \s+ ( (?: \[ (?: \\. | [^\]\\] )* \] | [^;\s\[] )+ )