Put this on the list of "bugs fix but not really": https://bugzilla.redhat.com/show_bug.cgi?id=1303305
"The package is broken so we released another package that fixes this but fail to include it in our default install so you have to know to install it to fix the bug"
Now to go clean up those 25k messages in the .esmtp_queue/ directory...
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko