sendmail DSN : data format error ??

[trinladen]

I just set up sendmail as a relay and some of my messages are getting the following error and Im not sure why. Basically this system is setup as a relay for the entire domain.

ay 24 09:58:04 [sm-mta] : from=<root@og2fg.mobular.net>, size=317, class=0, nrcpts=1, msgid=<200405241458.i4OEw4d1030660@og2fg$
May 24 09:58:04 [sendmail] i4OEw4d1030660: to=bob@mindwire.us, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=3008$
May 24 09:58:04 [sm-mta] i4OEw4rP030661: to=<bob@mindwire.us>, ctladdr=<root@og2fg.mobular.net> (0/0), delay=00:00:00, xdelay=00:00:00, ma$
May 24 09:58:04 [sm-mta] i4OEw4rP030661: i4OEw4rP030663: DSN: Data format error


What is a DSN data format error? and how can I fix this issue?

THanks
Trin