[PEGA 7.1.6] Check File Signature (MIME Type) to Determine File Type Before Upload
Is there an OOTB Activity or function that can validate the file signature (MIME Type) to determine that only valid files (not EXE, etc.) are being uploaded using the OOTB Attach Control? Or must this be done with custom code? If custom, can you lend any insight as to what that custom code would look like? We are already checking file extension, but in some cases that is not enough.