So I'm getting this from MXToolbox. I've requested from my ISP to change the PTR as it points to some ISP name and not my domain. My other question is, I've read that I should change the SMTP Connector/Virtual Server to the public FQDN as mine currently lists a .local (internal) address. However, I use a smart host (Barracuda) in between. So, do I need to change the Connector/Virtual Server or something in the Barracuda?