Strategies for finding the right email frequency  Stefan Pollard
at Email Labs has written a good article that looks at the
factors that dictate how often you should send marketing emails.
Clearly, finding the right frequency for emails is vital -
emailing customers too often can put them off, while not
emailing often enough can cause the same problems.  Stefan
outlines three strategies for determining the correct frequency:
1. Understand who controls frequency  Stefan points out that
customers are becoming savvier when managing inboxes, and many
will delete, unsubscribe from, or report as spam any emails they
may find annoying.  In addition, customers will often
consider annoying emails as spam, even if they have a
relationship with that company. In a DoubleClick survey, 49% of
respondents classified spam as '"email from a company I have
done business with but that comes too frequently''.  This means
that customers are the ones who should be determining the
frequency of emails they receive.  2. Listen to c