Using an SPF Record to prevent email spoofing.
I successfully followed these instructions on How To Install and Configure Postfix as a Send-Only SMTP Server on Ubuntu 14.04 to configure Postfix on my server.
My Droplet's hostname is
dummy.domain and this is the FQDN I used to configure Postfix.
dummy.domain is of course not a real domain name, but using it I was able to send mail from
firstname.lastname@example.org to a Gmail account.
In the article How To use an SPF Record to Prevent Spoofing & Improve E-mail Reliability it mentions "Adding an SPF record to your DNS zone file is the best way to stop spammers from spoofing your domain. "
However, there is no DNS zone file for
dummy.domain as it's not a real domain. So, is it possible to create an SPF record for this hostname and if so, where should I create it?
Many thanks in advance, Steve.