![robber.png](https://www.zensoftware.co.uk/blogresources/2012/08/robber.png)
One of the more common customers support calls i get relates to MDaemon suddenly sending vast amounts of spam email. This floods the outbound Internet connection and everything crawls to a halt.
Secondary to this the server's public IP address can get listed on various external SMTP blacklists which the customer then has to request removal from.