Related

Tool Instant DNS Lookup Tool Tool
Problem installing wordpress on subdomain (nginx / ubuntu) Question Question
GUI for MongoDB needed to mange Meteor app Question Question

Question

Using an SPF Record to prevent email spoofing.

Posted April 5, 2016 3k views
UbuntuSecurityEmailDNS

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 user@dummy.domain 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.

Add a comment
nuxx
By:
nuxx
Add a comment

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

×
1 answer
1upnate April 5, 2016

Without a zone file, there’s no real way of creating one that I’m aware of, as SPF is just a type of DNS record.

Also, if the domain isn’t real and/or doesn’t functionally resolve anywhere, there’s no way for other servers to perform queries on its DNS records. Even if the SPF record were to exist locally, there’d be no way for your email’s recipient and/or other mail providers to get that information, thus rendering the local SPF record function-less.

Reply Report
Submit an Answer

Related

Looking for something else?

Ask a new question Search for more help