If you were not aware that you sent an attachment, then it is possible that your computer is infected with a virus. For a list of blocked attachments, please see the IU KB document "At IU, what types of attachments are blocked from my email account?" ( ) Because viruses or malicious scripts can be easily distributed in executables, scripts, and compressed files, the IU Exchange servers will delete the email if a blocked attachment is detected, in order to protect our users. Your message wasn't delivered due to an e-mail rule restriction created by the recipient's organization e-mail administrator. scr attachment, you will receive a "Non delivery report" message (a "bounce") stating:ĭelivery has failed to these recipients or groups: If you send a message from an Exchange account with a. Because of the amount of NDR traffic that spam and viruses cause, many systems do not accept NDRs. However, it's up to the sender's email system to accept NDRs.
The filtering software at the external mail relays blocks the entire message, and will generate a nondeliverable response (NDR) message to the sender. If someone from outside the IU Exchange environment sends a message containing one of the blocked attachment types to your Exchange account, you will not receive the attachment or the message. Microsoft Exchange's anti-malware protection strips blocked files from messages leaving the IU Exchange system and delivers the messages to recipients without the attachments. Alternatively, you can share the file using one of IU's file-sharing services, such as Slashtmp, or one of IU's cloud storage services (see Options for storing files at IU). If you know your file is safe and need to share it, you can rename the file, using either a different extension or no extension, and then attach it to your email message.
The UITS attachment filters block the file types listed at Blocked attachments in Outlook.Īrchive files (for example, ZIP or TAR files) that contain any of the listed file types will also be blocked. To protect computers at Indiana University, UITS has enabled filters for attachments that have been known to carry viruses. If the email is from someone you know and trust, ignore the warning.Types of attachments blocked from IU email accounts
If the email looks suspicious, don't reply and don't download the attachment. If you open the attachments, there's a chance malicious software could start running on your computer or device. We can't confirm that the message's attachments are safe to open. If this fixes the problem, try enabling labs one at a time. Try opening Gmail with labs disabled at this page.Customizable tabs: you can see whats new at a glance and decide which emails you want to read and when.
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