I Have Collected The Necessary Information.
Now How Do I Authenticate My Emails?

Following are instructions for implementing three types of email authentication systems (SPF, SIDF, and DKIM).

Implementing Sender Policy Framework (SPF)

1. Audit and make a list of all IP addresses that send email on your behalf. Talk to your IT staff and any Email Service Providers you work with.
2. Create your SPF record: Use this SPF Setup Wizard to publish which IP addresses and servers you use to send email messages: http://www.openspf.org/wizard.html.
3. Publish your SPF record in DNS.
4. Verify that your SPF record is published and working:

   a. Use the tool at: www.dnsstuff.com.
   b. Copy all the information after the “@” sign in the “From” line of the domain you wish to verify (e.g., @yourcompany.com).
   c. Paste this information into the look-up field on the far right column (DNS Lookup).
   d. Select the “TXT” option from the drop down box directly next to where you just pasted your domain information.
   e. Select “Lookup.”
   f. Under the “Answer” box you should see “v=spf…” This verifies that your record is SPF compliant.

Implementing Sender ID Framework (SIDF)

1. Audit and make a list of all IP addresses that send email on your behalf. Talk to your IT staff and any Email Service Providers you work with.
2. Use this four-step wizard: Go to: http://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/
3. Verify that your SIDF record is published and working:

   a. Port25 Solutions has created an automated testing tool to verify Sender ID implementation. To use the tool, send an email message from the sending environment you wish to verify to check-auth@verifier.port25.com. (Leave the “Subject Line” and the body of the message entirely blank.) In return, you will receive a reply containing an analysis of the authentication status of the message you sent.

Implementing DomainKeys Identified Mail (DKIM)
DKIM is offered to all users free of charge. DKIM is available at http://domainkeys.sf.net. DKIM requires more computing resources than IP based technologies.