Hi guys im not sure how much this has got to do with Web Hosting but i think you just may be able to help me. We have an account with MailChimp they are an email marketing company. Recently i have been trying to send them emails but they dont seem to receive it. I have sent them emails from @mydomain.com from three different servers but they still receive nothing. So i sent them an email via webmail through cPanel and they seem to receive that fine. However if i try sending an email via my outlook they dont receive anything? So i thought maybe my IP is blocked? I had provided them with my IP address and they tell me i am not listed anywhere. Whatelse could be the problem? I am using the server details as 'mail.mydomain.com' for both incoming and outgoing. I can send and receive emails with the world except with my mail marketing company. Whatelse could be preventing my mail from ending up in their servers? Remember if i send with Outlook they dont receive it, if i send via webmail they seem to receive it fine?