If NetApp claims to support SMTP, it would be nice if you could fix the bug where SMTP commands from a NetApp box are only terminated with LF, not CRLF as RFC 821 explicitly specifies.
There are a few other problems with the smtp implementation; it's not RFC1123 compliant either. But then again, most OSes out there these days are not strictly compliant with RFC 1122/1123. (For example, SunOS 5.x will automatically start operating as a router if it has more than one interface.)
Bruce