Testing SpamAssassin ( GTUBE – the Generic Test for Unsolicited Bulk Email ) If your spam filter supports it, the GTUBE provides a test by which you can verify that the filter is installed correctly and is detecting incoming spam, in a similar fashion to the EICAR anti-virus test file Send an email with the following string as the body of the email: XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X