Stop Emails going to spam

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I have several sites all on one VPS server and my mail keps going to spam or not even accepted. I do not spam anyone, any mailings I do are using outside sources. Here is an example of an email returned today.

SMTP error from remote mail server after MAIL FROM:<> SIZE=224938:
host mail.xxxx []: 554 Sending address not accepted due to spam filter

I particularly have problems with Hotmail, if I want to email my client list they do not get there.

Can anyone help???

Skills required:
Anything Goes, System Admin, Web Security, Website Management
About the employer:
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