Messages that are received with a "Content-Length" header can be validated to ensure that the size of the message is less than the Maximum Message Size specified. Messages that are sent with chunked transfer encoding are not validated against this size restriction.

When selected, Web Users can upload files that do not have extensions.

This option enables the File Extension Filter.

The file extension filter can permit all files, restrict specific extensions or only permit specific extensions. If you want to specify the file types Web Users can or cannot upload, type each file extension in this box. Type all extensions without periods (.), separate them with commas, and do not add line breaks or spaces (for example, if you want to allow only .txt, .xls, .xlsx and .csv files, type txt,xls,xlsx,csv). The maximum number of characters for this field is 2000.

When selected, messages that do not include a file name are allowed. Files without a name are saved with the name "as2data_[datetime]" (where [datetime] is the current timestamp including milliseconds).