Search Again: Writing SPF records in Dns From: Jody McAlister Date: Friday, March 5, 2004 Time: 10:54:35 am Sorry if this has been hashed out already. But I have a client with a mail server at their location (non-spammer) and I run their dns for them. They just setup the mail server last week and are now seeing some reports about SPF blocking them. I did some research and found this information below. To enter this information as a dns record on Mac OS X, would I choose insert record and then choose other as the type? Then would I put the type as txt and then put the additional info in the data field? I found this at http://spf.pobox.com/dns.html iscweb.com. TXT "v=spf1 mx -all" iscweb.com has 1 MX record, pointing to one IP address. That IP address is now a designated mailers. If other machines in the domain also send mail, designate them. iscweb.com. TXT "v=spf1 mx ptr -all" This designates all the hosts whose PTR hostname match iscweb.com. If any other machines not in the domain also send mail from that domain, designate them. iscweb.com. TXT "v=spf1 a:iscweb.com mx ptr -all" Each of your mail servers should have an SPF record also. When your mail servers create a bounce message, they will send it using a blank envelope sender: <>. When an SPF MTA sees a blank envelope sender, it will perform the lookup using the HELO domain name instead. These records take care of that scenario. iscweb.com. TXT "v=spf1 a -all" mail.iscweb.com. TXT "v=spf1 a -all" --Apple-Mail-1--726119111

Messages In This Thread: Writing SPF records in Dns by Jody McAlister on Mar 5, 2004 at 10:54:35 am