phpList adding non-existent spacer.gif to message

My messages are coming with “” added to them which is causing error messages with There is no use of a spacer.gif in the original message, no reference to one in the phpList footer. Any idea where this is coming from??? Thanks!!

@Marcus see this earlier topic [SOLVED] Not seeing views or unique views in 3.3.3 - #3 by BaliDave

In that case mailscanner was removing the phplist user tracking pixel.

Ok that makes sense. Thanks!