It's rather simple, actually. When the Crone is coming to fruition in the waning dark of the Moon, you must create a black waxen image of your computer with wick for lighting, or black candle if you're not artistic. Upon it with your Burin, which can be found at various stores throughout the Internet, inscribe these words, "I desire to leave this list [name]", along with the Tattwa for the Element of Fire, representing freedom, change and destruction, the Elder Futhark rune of Thurisaz, representing freedom in movement, the masculine in action and destruction of obstacles, and the Ogham symbol for Birch, representing new beginnings, purification and changes. You'll need a banishing incense of your choice and two lodestones. Cast circle, yadda, yadda, yadda, dress waxen computer image or candle and place on pentacle, light.
Repeat the following Irish prayer three times while holding a lodestone in each extended hand, one to attract that which you desire and one to repel that which you do not:
Brighid, gold-red woman,
All the while visualizing your E-mail box empty and free of further E-mails from the offending list. When your feel your power reach it's peak, quickly drop the lodestones, point all ten "fingers" at the image or candle and direct all energy through your fingers and into the image, crying So Mote It Be! in a firm and powerful voice.
Let the image or candle burn until spent. Flush any remaining wax down the toilet. If you've done everything correctly, this *should* work.
However, if it does not you could try following the directions given on the site which hosts the list. They probably are something mundane like:
To be removed from this list send a blank message to: