GuideStar: The Consequences of Bad Bounce Processing

GuideStar, a highly respected non-profit organization whose work is to collect information about and provide resources to other non-profit organizations, is still sending email to an email address that almost certainly did request that email — sometime in the late 1990s. The email address was closed and disabled in 2004, however, and was not re-enabled as a spamtrap until 2008. Four years of 500-level SMTP rejections failed to get it removed from GuideStar’s list. How much of that list now consists of old, dead email addresses? How much of it now consists of spamtraps? The ESP is fortunately Lyris, which actually cares about good list management and should be able to help GuideStar fix this problem.

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