How To Set SPF records In Google Apps For Business

Google Apps for Business allows the use of SPF for cut back on mail spoofing. SPF (Sender Policy Framework) records allow a domain owner to specify which hosts are permitted to use their domain name when sending mail. This security seffting cuts back on email spoofing.  Because SMTP is implemented in a manner which allows the sender of an email to claim to be someone else, spammers and conmen take advantage of this design flaw to send emails with forged From: addresses. The Sender Policy Framework allows a domain owner to use a special format of DNS TXT records to specify which machines/hosts are authorized to transmit email for their domain, making it difficult (but not impossible) to forge From: addresses.

If you are using Google Apps For¬†Business and wish to use SPF, you can publish SPF records for your domain. Having these records in place will ensure that messages sent from users in your domain are not rejected by the recipient’s domain as well.

To set the domain’s SPF record, access the domain’s DNS settings. On the DNS resource, publish the following TXT record:

v=spf1 ~all

ProTip: Publishing an SPF record that lacks or specifying -all instead of ~all may result in your mail not being delivered.