FW: Mail delivery failed: returning message to sender

[Don O'Neil]

I've been getting these messages fairly regularly lately. We're running SA
3.1.8 and Exim 4.6.6 on FreeBSD 6.1. I've changed the exim->SA config to go
through a pipe rather than the traditional way, set it to only scan messages
<100K, turned off Bayes AutoLearn because it was creating token files in the
multiple hundred megabyte range and it still is popping up. I've held off on
upgrading to SA 3.2.1 because of the performance issues I've read about, I'm
concerned that the problem will get worse if I upgrade. 

Anyone have any ideas on how to fix it? 

Here is the message:

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  repos at buylv.com
    local delivery failed

The following text was generated during the delivery attempt:

------ repos at buylv.com ------

An error was detected while processing a file of BSMTP input.
The error message was:

  421 Lost incoming connection

The SMTP transaction started in line 0.
The error was detected in line 3.
0 previous messages were successfully processed.
The rest of the batch was abandoned.
421 Lost incoming connection
Transaction started in line 0
Error detected in line 3