.rar files corrupted after file transfer

Hi all,

Since a while I've got some issues after transfering .rar files to our clients.
Everytime when I sent a .rar file we can not open it on the client due the file has been corrupt.

I've tried many times, with different files and different clients.
Once I'am repack the files in an .zip archive the is in good order.

It is a bit of hassle were the .rar files are automatically generated on our systems. 

Also my colleages has the same issues. currently I am using version  15.4.8332 and Client has the same version.

Hopefully we can solve this matter quickly.

With kind regards,

Dominique den Hartog