Google blocking 7zip

Gmail codepope at
Fri Mar 28 10:30:32 GMT 2014

Google scans zip and other archives for particular executable file extensions.

"You can't send or receive the following file types:
.ade, .adp, .bat, .chm, .cmd, .com, .cpl, .exe, .hta, .ins, .isp, .jse, .lib, .lnk, .mde, .msc, .msp, .mst, .pif, .scr, .sct, .shb, .sys, .vb, .vbe, .vbs, .vxd, .wsc, .wsf, .wsh
Messages containing the types of files listed above will be bounced back and returned to the sender automatically. Gmail won't accept these file types even if they're sent in a zipped format. Here are some examples of zipped formats:

.zip, .tar, .tgz, .taz, .z, .gz, .rar"
One assumes this has expanded to .7z files and that the archive contains one of the <dramatic music> banned extensions. 


On 28 March 2014 at 10:16:20, Richard Hopkins (richard.hopkins at wrote:

Some time this week, Google started blocking 7zip encrypted archives (.7z).  
You can no longer send or receive emails which contain 7zip encrypted  
attachments nor share them using Google Drive.  

I haven't seen any announcement about this...nor any discussion, but it's  
causing us (as a Google Apps for Education "customer") pain.  

Google are, of course, only doing this for our protection. What other  
reason could there possibly be?  


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the ukcrypto mailing list