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GTUBE

The GTUBE (Generic Test for Unsolicited Bulk Email) is a test string used to test anti spam solutions, notably those based on spamassassin. It is a 68 byte string, and by default it carries an antispam score of 1000, which would be sufficient to trigger any installation.

The contents of the string are as follows:

XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X

And should be placed in the message body of a RFC822 compliant email message, without any linebreaks or whitespaces.

Note that there exist some varieties that might not be recognized by all filters, notably the NAItube (which will carry a variable weight) and the GTphish (which will trigger specifically as a phishingmail), which are used in the Mcafee implementation of spamassassin.

Source: http://spamassassin.apache.org/gtube/

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This guide is licensed under the GNU Free Documentation License. It uses material from the Wikipedia.