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Some spamers user faked mail header information. in my case the from and the reply to header contains an email-adress from our domain. these email were never send from our servers, so they came from the outside of our domain. is there any possebility to confige the KMS that way, that he blocks mail from external when it contains header informations of the internal domain?

thanks for Help

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You can create a spam rule that blocks all mails with your domain in the From / Sender header. You have to make sure that the IP range where your users send from is in the exception list, otherwise you block your own users!

Another possibility would be to populate your DNS with SPF records and switch SPF on on KMS.

Dexion AG - The Blackberry Specialists in Switzerland

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freakinvibe wrote on Thu, 12 July 2007 11:19

Another possibility would be to populate your DNS with SPF records and switch SPF on on KMS.

By far the best choice, since then the whole world can benefit... but somewhat complicated if you also have 3rd-parties sending email on your behalf (such as mass-mailing PR companies).
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