Change your validation type top On Device
The error should not at all relate to SMTP data
016-781 RAP
Scan Server Connect ERR. The CentreWare scan service could not connect to the server to
send a file.
Procedure
1. Set up the proper machine ‘Subnet Mask’ and ‘Gateway.’
2. ‘PING’ from the destination server, check that the machine is connected.
3. Check that the machine with Windows or UNIX can connect to the destination server via ftp/smb