email in smtp log, but not to email client

[icccapital]

From just one domain (that i know of) our email server (exchange 2003) will
not pass on the email if it has an attachment. If there is no attachment the
email is delivered fine.

I turned on smtp logging and can see the email arrive the lines are below if
they will help. After it hits the smtp log nothing seems to happen. We have
GFI mailessentials as our spam filter, which it does not get to. I turned on
"backup email before it gets to gfi", which is an option in their system, but
it doesn't get there. And I turned off GFI all together and the email
doesn't seem to get through.

It seems that somewhere after arriving the email is dropped or something
like that. Any ideas or ideas for trying to figure out what is going on?
Thanks

2009-11-13 19:31:33 69.191.244.23 mgnj5.bloomberg.net SMTPSVC1 ICCSERVER
192.168.1.252 0 EHLO - +mgnj5.bloomberg.net 250 0 278 24 0 SMTP - - - -
2009-11-13 19:31:33 69.191.244.23 mgnj5.bloomberg.net SMTPSVC1 ICCSERVER
192.168.1.252 0 MAIL - +FROM:<sen...@bloomberg.net> 250 0 45 43 0 SMTP - - - -
2009-11-13 19:31:33 69.191.244.23 mgnj5.bloomberg.net SMTPSVC1 ICCSERVER
192.168.1.252 0 RCPT - +TO:<cli...@ouremail.com> 250 0 35 32 0 SMTP - - - -

[Jeffrey]

We had similar issue here. It has entry in SMTP log, but not in exchange log.
We also had same guy send email from his BlackBerry, same result. Please help.