Ok, I am looking at offering an email marketing service for my clients. I have looked into being a white label reseller from email marketing providers and to be honest the ones that offer white label reselling do not give me the flexibility that I need.

So, now it has come to a point that if I want to offer this to my clients it needs to be custom built. Ok, so programming it is easy however here is where my concerns come in:

How can 1 run an email marketing service without it getting blacklisted due to scammers and spammers? Are there any resources for running your own email marketing service business?

Please shed some light on this issue.