SPF Records ??
in [Design]
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From: Jim Thompson on 25 Jun 2010 13:31 Recently I've been seeing some spam bounced back to me where the originator has spoofed my E-mail address. I've been told that I should create an "SPF Record" to alleviate this. The snag, I have a multi-path E-mail route: World => Inbound => Website Alias Sort => Cox => Retrieved Sent Outbound => Cox => World So how do I do the SPF Record? Thanks! ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
From: Dave Platt on 25 Jun 2010 15:24 In article <ecp9269eis07dmqt1g3vumml9g59kct2sv(a)4ax.com>, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)On-My-Web-Site.com> wrote: >Recently I've been seeing some spam bounced back to me where the >originator has spoofed my E-mail address. > >I've been told that I should create an "SPF Record" to alleviate this. > >The snag, I have a multi-path E-mail route: > >World => Inbound => Website Alias Sort => Cox => Retrieved > >Sent Outbound => Cox => World > >So how do I do the SPF Record? The path through which you receive and retrieve your email is irrelevant. It has nothing to do with SPF. What you'll want to specify, in your SPF record, is the list of hosts that can *send* email using your email address. That would include the Cox SMTP servers that push your mail out to the outside world. It *might* also need to includ the IP address that you use to send outbound email to Cox - probably not, through, if you're using any sort of authenticated connection to hand off the mail to Cox. You can specify the Cox servers in your SPF record in any of several different ways, each having advantages and disadvantages: (1) Individually, by IP address. (2) By IP address range (3) By referencing a Cox domain or sub-domain that has an SPF record. In your case I suspect that approach (2) is likely to be the way to go... figure out which IP subnet Cox is using for the outbound SMTP servers that serve your area, and specify that subnet. You'll have to depend on Cox making sure that *other* Cox customers can't forge outbound email using your domain name... they ought to be providing you with an "authentication required" mail submission port which does some amount of user and domain validation. -- Dave Platt <dplatt(a)radagast.org> AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads!
From: Cydrome Leader on 25 Jun 2010 18:37 In sci.electronics.design Jim Thompson <To-Email-Use-The-Envelope-Icon(a)on-my-web-site.com> wrote: > Recently I've been seeing some spam bounced back to me where the > originator has spoofed my E-mail address. > > I've been told that I should create an "SPF Record" to alleviate this. > > The snag, I have a multi-path E-mail route: > > World => Inbound => Website Alias Sort => Cox => Retrieved > > Sent Outbound => Cox => World > > So how do I do the SPF Record? > > Thanks! > > ...Jim Thompson just use this site http://www.openspf.org/ fill in the domain box and click go, you can fiddle with it from there.
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