Sometimes it’s interesting to test some MTA’s and their spam behavior, every mail system has his own spam behavior like SPAM_MARK_LEVEL or SPAM_REJECT_LEVEL.
If you send a mail with GTUBE string your mail should be rejected.
1 | rejected after DATA: This message scored 1000.0 spam points |
The GTUBE String to test spam rejection of mail servers:
1 | XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X |