We are looking at an email campaign using an email list made up us addresses provided by our current customers. They have opted in.
Someone has put the idea in the head of our owner that the majority of the emails we send will not be delivered due to "SPAM blockers" put in place by the various ISP's.
1-Is this a valid statement?
2- If so, what are my options to maximize our campaign?
I plan on using a service like "Constant Contact"
FYI I'm no techie, so I'll take all the help I can get.