I'm building e-commerce website that will sell all kind of items, what is the best way to send emails to clients?
Our selling department will send a lot of emails to customers, emails like delivery, newsletters, coupons, and etc..
I don't want to use mail() function because the customers will receive emails to spam box, what is the right way to do it?
There is a companies like benchmarkemail, icontact, mailchimp, do i need to use them?