Gettor: TBB too big now for Gmail
TBB for Windows is 27MB now, TBB for Linux 40MB. Gmail accepts only 25MB attachments from external sources.
It does however support 10GB (!) attachments from other Gmail users, so one idea would be to use Gmail to send Gettor mails?
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information