I'm using Maildrop 1.7.0 (Debian package) to filter mail through SpamProbe. Almost all messages get delivered properly except those with large attachments (known to be a problem at >137KB). Messages with large attachments cause an exit code of 75. Attempts at redelivery fail with the same error message. The relevant lines from .mailfilter are:

# score the mail with SpamProbe and tag it SCORE=`spamprobe train` xfilter "reformail -I \"X-SpamProbe: $SCORE\"" log "Completed SpamProbe - Score: $SCORE"

...and the output is: maildrop: Filtering through `spamprobe train` Unable to execute /bin/bash maildrop: Filtering through xfilter reformail -I "X-SpamProbe: " Unable to execute /bin/bash maildrop: error writing to filter. maildrop: Unable to filter message.

The "Completed SpamProbe..." line does not show up in the log file. $SCORE is usually a string of the form "SPAM 0.9998434 5542938c7224d326c28ca89f69a56969" The same message goes through SpamProbe without problems when called from an interactive bash shell.

Any suggestions for troubleshooting would be greatly appreciated.

Thanks,

Al