i'm running the same setup on 7(6 on namecheap and one on godaddy) different websites that have about 100-1000 people signed up and it works fine. the site that has 20,000+ people when i send a message it just pauses then gives me a internal error message(godaddy site). i've spoken with godaddy and they told me there is 2 mod rewrite errors. the same set up i am using is your plugin, wp mail from and wp mail smtp plugin. on the wp mail smtp plugin i have tried many different variations of setting it up. then i went and created the wordpress@mydomainname email but im not sure where to put it? smtp plugin? any suggestions? i would hate to delete the 20,000 people to start over.