[Cialug] {Spam?} Postfix, Amavis, Spamassassin

[L. V. Lammert]

One of our LUG folks here in St. Louis getting blocked when sending 
email to three recipients:

>was considered unsolicited bulk e-mail (UBE).
>
>Our internal reference code for your message is 02637-17/U86O1GkbpeN7
>
>First upstream SMTP client IP address: [70.242.65.247]
>adsl-70-242-65-247.dsl.stlsmo.swbell.net
>According to a 'Received:' trace, the message apparently originated at:
>[70.242.65.247], [192.168.2.11] adsl-70-242-65-247.dsl.stlsmo.swbell.net
>[70.242.65.247]

He is using SASL authentication, .. and postfix is configured to not 
block any email from a SASL authenticated sender:

  smtpd_sender_restrictions =
          permit_mynetworks,
          permit_sasl_authenticated,

Sooo, I assume there is a UBE threshold being triggered in wither 
Amavisd or Spamassassin, however I can find no section in the 
respective conf files that seem to indicate a threshold that could be 
updated. Google isn't of much help, ..

Is anyone aware of where Amavis or SA actually sets the number of 
recipients for a UBE reject? That seems to be the reject reason as he 
does not have a problem when sending with less than three recipients.

         TIA!

         Lee