[Gordon Lyon]

If your server is filling up with delvieries that have already been downloaded by all of the recipients, you can go to the Delvieries Settings page and lower the "Number of days deliveries are stored after all recipients have downloaded" setting. If you set this number to 0, they will be deleted from the server as soon as the last recipient downloads them.

Sounds like the error message should tell you to contact the administrator, not the recipient. We'll definitely take a look at that.

Thanks, Gordon