Files larger than 998 record length with extension .csv or .xls are getting blocked by CSSMTP.
(Report: 500 5.2.5 JES Text line too long)
Text files with extension .txt go thru fine.
Release : 14.0
Files with extension .CSV or .XLS are not supported by the CSSMTP driver unless they are in ASCII format (binary files).
PTF LU09344 solves this problem