UriExpander: Broken pipe while connecting

HI,

i need help.

We have a loot of Spam E-mails witch pass through, but this E-Mails should be blocked (by Dictionary Filter or Spam Filter),

the problem is that the E-mails have in the Logs UriExpander: Broken pipe while connecting to xxx.

Its possible to send all E-Mails with this problem to the Quarantine.

Thank you for your help