SPF Help

Last night I had over 3000 messages that were bounced back to me. Someone is using my website with anything in front to send out email.

I understand the SPF is supposed to help. What would the SPF text record be. I've read thru the emails and tried this in the past. But now that I'm getting so many I have to put this in to try and stop the junk mail and the bouncing back to me. Any help would be appreciated.
Thanks,
Gil

 

Hi,
The on-line help has a good section on this:
http://help.smartertools.com/smartermail/v5/Default.aspx

On the left side...Click on Help for Domain Administrators, then Domain Settings.

 

I took a look. But it appears to be for receiving emails and not sending. Many of the emails bouncing back to me are from valid users. But someone is using my web site email like [email protected] to send out there spam. It hits a valid email user and there software bounces it back to me. I want to use the SPF on my server so that no one can send emails out except for me because I'm using a valid set of IP addresses to send it.

This is what I figured out but not sure if it's totally accurate. The text record as follows.

v=spf1 ip4:216.32.60.0/24 ip4:64.209.134.0/24 ip4:64.79.170.0/152 ip4:64.209.135.0/24 a mx ~all

Thanks,
Gil

 

Thanks for the response. If I don't use the catch all does it still consume space on my account or are they deleted immedialy?
Thanks,
Gil