Prison. Solitary confinement. A very limited computer, able to
receive Email but nothing else. An Email address widely and
frequently exposed on newsgroups, web pages, and other venues
liable to harvesting.
Three times a day—at unpredictable times—an Email with a
random subject line would contain a password needed to get the
next meal served. This might be at the end of the (otherwise
typical SPAM) message, in the middle, near the beginning, but
the prisoner would need to read each and every EMail to find the
password for his next meal.
[Found in a newsgroup]