We have only 1 email user (remote client, @comcast.net) that cannot send us email. Checked the Exchange 2007 SP1 msg tracking (OS Windows 2003 server std.) and we see the message as received but with this error "554 5.6.0 STOREDRV.Deliver; Corrupt message content". The recipient does not receive emails only from this person. Able to receive emails of all other clients. Also, able to receive email for other email accounts within company (recipient domain). How to get this corrupted email out of queue or where ever, to allow incoming for this recipient? Also, note running Trend Micro Worry Free v5.1 on Exchange server and all client PCs - might be corrupting certain emails. Added allowed sender in Trend and whitelisted in Exchange.