HOWTO: Setup a SPF Record for Your Domain

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HOWTO: Setup a SPF Record for Your Domain

Document: Q1334

Overview:

Some domains block sending emails from non-authoritative domains, it is perceived as spam, or a spoofed account. To avoid bounced emails from these types of mail servers, support suggests contacting your authoritative mail provider and have their DNS administrator add the link2exchange server IP address as an approved sending mail server

Procedure:

SPF: Sender Policy Framework

What is SPF?

SPF is the anti-forgery solution for email. This record combats possible forged return addresses, which makes it easier to identify 'spoofed' emails. An SPF record is a one-line entry in your DNS record that indicates which mail servers are permitted to send email with a given from address. SPF is an attempt to counter email address spoofing, in which a sender uses someone else's e-mail address as the apparent sender of an e-mail.

How SPF Works:

When a user sends mail to you, an email server that belongs to their domain connects to an email server that belongs to you. The senders domain uses SPF to publish the addresses of its email servers. When the message comes in, your email servers can tell if the server on the other end of the connection belongs to the legitimate sender or not. SPF works by domains publishing 'reverse MX' records to tell the world what machines send mail from the domain. When receiving a message from a domain, the recipient can check those records to make sure mail is coming from where it should be coming from. With SPF, those 'reverse MX' records are easy to publish: one line in your DNS entries is all it takes.

Support suggests that you contact your domain DNS administrator: Have them approve and add the Link2exchange mail server IP address of:

66.211.136.1

**NOTE** This is not a MX record change, it is an SPF record. If you do not understand these instructions please contact your DNS provider.

Keywords:

SPF

Notes:

No Notes.

Document Created: Oct 24 2006 1:13PM by: Jason Lehoux, last updated: Aug 26 2008 12:37PM - Q1334