Different ISPs react in different ways to email, so if you want to see specifically how you are delivering to Windows LiveMail or to T-Mobile then we can add a seedlist of roughly 1000 return path owned email addresses to your campaign and report back on how you are truly delivering to different ISPs.

When a recipient clicks the report spam button, that email address is passed back to us via the ReturnPath feedback loop and we suppress that person from all future mailing so as not to become blacklisted by that ISP. A complaint rate of more than 0.4% means your mailshots are starting to show up on most ISPs grey lists.