From the description, this may be an issue caused by the ODBC driver for SQL Server (your connection string appears to use the "Microsoft OLE DB Provider for ODBC Drivers"). Instead of creating an ODBC DSN entry in the ODBC Data Sources, can you please change your database connection string to use the "Microsoft OLE DB Provider for SQL Server" instead (see screenshot)? This will bypass the ODBC DSNs, and will allow you to specify directly the SQL connection settings.

Alternatively, you could use a UDL file to specify the connection. However, in the UDL file please make sure you select the OLE DB Provider for SQL Server to avoid causing the same issues. There is a sample UDL file for SQL Server you can use as a template to customize in the \SpamFilter\database folder.