I have one user that cannot send to another user in my ex2007 environment. The only thing I can find in the message tracking logs is a 03I: error in the messageinfo field. I've checked other websites and technet but there is no information on this error. The message info field is suppose to contain date information. Anyone have any idea what this error means or what else I can look at for the reason why 1 person cannot send to just 1 other person (but can receive from this person). I have checked all spam filters/settings that we have as well. TIA