Return Path has
two tools that will let you check your CRM's Sender Score (Reputation) and if the server is blacklisted or not. You just need the IP address of your mail server. To get it, just send yourself an email from your CRM to your personal email address and view the header to grab the sending IP.
To the topic at hand, most CRMs don't maintain individual mail servers for each of their clients. Typically they have a pool of email servers that all of their clients share. That means even if you are meticulous about segmenting and managing your list, other dealerships who may be more "spammy" in their email marketing efforts can negatively affect you.
That’s right, the dealer down the street who uses the same CRM as you, who repeatedly blasts their email list, can cause YOUR emails to not reach their intended recipients because you share the same mail server. Tell me that's not a little messed up?
Warning, self promotion: I blogged about why CRMs aren't that great for email marketing a while back. If anyone is interested, you can check it out
here.