Now that we have some users on Office2000 using Outlook certain attachments are being blocked. This also appears to be OS dependent, as Win9x users can receive attachments, but W2k users can't. I have searched for info and found a list of what's blocked, but am unable to find where to change this list in the Exchange server. Any help would be appreciated. We are running Exchange 5.5 in a NT4 domain. Thanks. Carolyn Ramsey MIS Support Texoma HealthCare System 903-416-4175 "This electronic message may contain information that is confidential and/or legally privileged. It is intended only for the use of the individual(s) and entity named as the recipients in the message. If you are not an intended recipient of the message, please notify the sender immediately and delete the material from any computer. Do not deliver, distribute or copy this message, and do not disclose its contents or take action in reliance on the information it contains. Thank you."