Google blocking 7zip

Alan Braggins alan.braggins at
Fri Mar 28 11:09:57 GMT 2014

On 28/03/14 11:04, Richard Hopkins wrote:
> --On 28 March 2014 10:30 +0000 Gmail <codepope at> wrote:
>> One assumes this has expanded to .7z files and that the archive contains
>> one of the <dramatic music> banned extensions.
> Yes, I kind of assumed the same (that .7z had been added to the list,
> but the webpage hasn't been updated to reflect).

The web page does say "examples" of zipped formats, implying it's not
a complete list.

> However, *all* .7z (encrypted) archives are blocked, whether they
> contain "dangerous" attachments or not.

Depending on the encryption scheme used, it may be impossible to tell
what file extensions exist within the archive. cf. "It isn't possible
to send a password-protected zip file containing a zip file. Please
de-compress all files or remove the password protection if possible."

More information about the ukcrypto mailing list