File Types Blocked in Gmail

#1

Post by LogIN- » Mon, Oct 12, 2020, 4:02 PM UTC

File Types Blocked in Gmail
support.google.com

Re: File Types Blocked in Gmail

#2

Post by chmaynard » Mon, Oct 12, 2020, 5:47 PM UTC

To the file system, all files are instances of the same type. Google's notion of "file type" is likely based on the extension, which is only a naming convention. If they're peeking inside at the contents to discern a signature, that's a security problem.

Re: File Types Blocked in Gmail

#3

Post by ChrisGranger » Mon, Oct 12, 2020, 10:57 PM UTC

chmaynard wrote: post #2

To the file system, all files are instances of the same type. Google's notion of "file type" is likely based on the extension, which is only a naming convention. If they're peeking inside at the contents to discern a signature, that's a security problem.

I had a password-protected .7z file blocked for security reasons, so I changed the file extension to .jpg to see if it would be accepted, and it was not.

Edit: I think all file extension issues can be bypassed by converting a file to an ASCII-armored format with GPG or age or similar...