One of the most common questions we get in regards to bulk emailing, is why didn't a particular user get the email or why it went into his/her SPAM folder.  This blog post concentrates on sender reputation, which is one of many factors in that discussion.  Reputation has become such a factor for determining the quality of a message, that for large internet and email service providers, the number one reason for an email not having been received by a recipient can be credited to the sender's reputation. 

If you haven't found yourself sifting through your inbox, wondering why you have so many Stupid Pointless and Annoying Messages (SPAM really stands for Simultaneously Published Advertising Message), then you are already making use of SPAM filtering in one form or another.

The truth of the matter is that 92.3% of all emails worldwide sent during the first quarter of 2008 were SPAM.  That's a ratio of about 12 SPAM messages to ever 1 legitimate message.  For home users this can be overwhelming, but for most businesses, this is unacceptable.  SPAM causes a loss in productivity and efficiency.