Hi there, I hope someone can point me in to the right direction. We seem to have an email problem. We get a lot of "delay warnings" and some bounce too. Many errors tell us we are "bad reputation sender". I have no idea what that means and why that happens. We are not spamming anyone, but sending out about 1000 invites to view places twice a week. I started reading up a bit and following links form the errors, but I do not really understand that geek stuff.

What skill must a person have and how is such person called who can help us with that?