GTUBE

The GTUBE ("Generic Test for Unsolicited Bulk Email") is a 68-byte test string used to test anti-spam systems, in particular those based on SpamAssassin. In SpamAssassin, it carries an antispam score of 1000 by default, 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 an RFC 5322 compliant email message, without any linebreaks or whitespaces.

There exist some varieties, notably the NAItube (which will carry a variable weight) and the GTphish (which will trigger specifically as a phishing mail), which are used in the McAfee implementation of SpamAssassin.

References

Official website

Standard test items

Pangram Reference implementation Standard test image

Television (testcard)	SMPTE color bars Indian-head test pattern Test Card F Philips PM5544

Computer languages	"Hello, World!" program Quine Trabb Pardo–Knuth algorithm Man or boy test Just another Perl hacker

Data compression	Calgary corpus Canterbury corpus

3D computer graphics	Cornell box Stanford bunny Stanford dragon Utah teapot

Typography	Lorem ipsum The quick brown fox jumps over the lazy dog

Other	EICAR test file GTUBE Harvard sentences Lenna "Tom's Diner" SMPTE universal leader

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GTUBE

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See also

References