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I have just setup a VPS with CentOS and Webmin. I am attempting to setup my email server. I can successfully send mail, however it always gets blocked by spam filters. What steps are needed to make sure it does not get blocked?

Domain: or
OS: CentOS
Setup method: VirtualMin & Webmin
Server Type: Postfix

On a seprate note.. I cannot receive email either. I don't know if this is a related issue or not.

I got this as a reply from a hotmail address:

host[] said: 550
    SC-001 (COL0-MC4-F32) Unfortunately, messages from weren't
    sent. Please contact your Internet service provider since part of their
    network is on our block list. You can also refer your provider to (in reply to MAIL
    FROM command)
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I am not sure how we can help you if the ip address your assigned is flagged as sender of spam. – Ramhound Dec 10 '12 at 21:15

What is your ISP/web-host ?

Since they are on Hotmail's block list, you will not be able to use your Hotmail account to send or receive emails while connected through your ISP.

You could bring this to the attention of your ISP. They may already know about it, but maybe not. Send them a copy of the error message you got from the bounced email from Hotmail as it may help them when they contact Hotmail to resolve the issue.

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I am using VolumeDrive's VPS. after doing some research I have found out they have whats called the "Internet Death Penalty" – alexander7567 Dec 11 '12 at 16:36

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