Email Restrictions
Attachments
Any email message with the following attachment filetypes will be blocked upon being received by Microsoft 365. The sender will be notified via a NDR (non-deliverable report) indicating that the email was not delivered due to the email including a banned filetype.
| .ace | .ani | .apk | .app | .appx | .arj | .bat | .cab |
| .cmd | .com | .deb | .dex | .dll | .docm | .elf | .exe |
| .hta | .img | .iso | .jar | .jnlp | .kext | .lha | .lib |
| .library | .lnk | .lzh | .macho | .msc | .msi | .msix | .msp |
| .mst | .pif | .ppa | .ppam | .reg | .rev | .scf | .scr |
| .sct | .sys | .uif | .vb | .vbe | .vbs | .vxd | .wsc |
| .wsf | .wsh | .xll | .xz | .z | .ppsm | .xlsm |
Receiving Blocked Files
If you require a file that would be blocked by the above restriction, and that file is coming from a trusted source, please ask that the individual provide you the file via the LiquidFiles service.