The analysis, of more than 500 million junk messages, revealed those letters that get more junk than average. It found that e-mail addresses starting with an “A”, “M” or “S” got more than 40% spam. By contrast those beginning with a “Q” or “Z” got about 20%.

The most popular letters for spammers were “A”, “M”, “S”, “R” and “P”. about 40% of all the messages arriving in the e-mail inboxes of accounts with addresses that had one of those characters as their first letter were junk. Much less popular were “Q”, “Z” and “Y”. For these cases, spam was running at about 20% or less.

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