I'm experiencing a very odd email problem (using RH9 + Plesk 6.0.2). Each email which is sent out has 2 enters everywhere instead of one. I've changed nothing of the default mail server settings after the linux & plesk install, this problem has been there from the beginning, i.e. with automated vbulletin emails. This problem only occurs with emails sent through web applications such as vbulletin.