When an email receives an empty target address, it causes the email queue to lockup and infinitely send emails. More details in:

https://yellowgrass.org/issue/WebDSL/383

In researchr this happened for an email address confirmation email, that’s how we spotted it. The source of the problem is in the looping email task, but there probably should not be an empty email address in the target field either.

Submitted by Sander Vermolen on 6 April 2011 at 10:09