Looking for a provider that will be able to send a mass email to about 15,000-20,000 recipients. Must be able to avoid having email being sent to spam boxes.
I am unfamiliar in this area and unknowingly sent a mass email through the admin of my new website, only to realize that many have gone to spam boxes. I am now concerned that other emails (not marketing related) that are sent from my admin may also go spam boxes - as I think I've been flagged. The second thing I am looking for in a provider is someone that can remedy this situation.
To summarize, I need:
1. Provider to mass email to about 15k-20k recipients without it going to spam boxes. Please explain your method.
2. Provider to help me out of the predicament I'm in with my websites admin & process/function emails going to spam boxes.