Right... so with that SPF record, all mail sent from the mail servers specified in your MX records will pass SPF, and all other mail servers will hard fail. That's exactly what we do as a means of blocking spam that forges our domain or a customer domain when sending to us or a customer. For example, a spam forges [EMAIL PROTECTED] when sending to [EMAIL PROTECTED] Since it wouldn't have come though the mail servers specified for example.com it would fail SPF and not go through to [EMAIL PROTECTED]
Darin. ----- Original Message ----- From: "Tom Pepper" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, May 25, 2005 9:24 AM Subject: Re: [IMail Forum] SPF Records Question Darin: Thanks, I understand it better, now. I want to to block the mail from delivery. v=spf1 a mx -all Tom | "-all" means hard fail, while "~all" means soft fail. How about sending | your entire SPF record and what you want to accomplish? | | Darin. | | | ----- Original Message ----- | From: "Tom Pepper" <[EMAIL PROTECTED]> | To: "++++IMail List" <[email protected]> | Sent: Wednesday, May 25, 2005 8:31 AM | Subject: [IMail Forum] SPF Records Question | | | Last September, I generated a SPF file at pobox.com which specified to use | "-all" | | This Tuesday, I went back to pobox and generated the file again (several | times to test it) and this time it specified to use "~all". | | I'm now a little confused. In your opinion, what should it be? I am | currently testing with "-all" and things seem to be working properly. | | The file is set up on our external dns server. Should one also be set up | for the internal dns server that runs behind the firewall? | | Thanks for you help. | | Tom | | | To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html | List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ | Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ | | | To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html | List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ | Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ | To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
