MBF Knowledge Base

How to block attachments by file extension in SmarterMail v16x

Log in as the System Administrator

Go to the Settings area

Click on General Settings

Look for the Attachments card: here you'll have editable areas for both Incoming Extension Blacklist and Outgoing Extension Blacklist.

Click on whichever you want to edit and add your extensions: BIN, ZIP, EXE...one item per line.

Save your changes.