SFP (Sender Framework Policy)
How often have you or your client sent an email it never got to its destination.. !!
Its normally because you / thay don’t have the domain setup to handel a SFP record
What is SFP
This is seen as a simple anti-email spoofing mechanism that checks if the sending server has been authorized by the domain’s mail servers to send email.
The SMTP protocol allows, by design, any machine to send emails claiming to be from any domain they want to, and as spammers and phishers used to forge email addresses or make individuals from different organizations leak sensitive information, the SPF was created to cover this SMTP blind spot.
This is a simple record added in the DNS settings of the domain that enables mail servers to check the “Envelope-from” address, also known as return-path. This way spammers may not spoof the envelope sender address, as remote mail servers with SPF checking enabled, will verify where the message is originating from.
WHY should you have one..
Well there are two reasons.
1. Spammers are less likely to spoof emails from your domain as they are going to get caught in anti-spam filters that check the SPF record.
2. Most large and well organised mails servers will only accept mail from a real SFP checks.
At A2Z Computing we use : -all at the end of our records this only allows mail that matches one of the parameters (IPv4, MX, etc) in the record everything else is dropped.
for more indepth information please see : http://www.openspf.org/ or https://en.wikipedia.org/wiki/Sender_Policy_Framework
Once you have created your record please check it : http://mxtoolbox.com/spf.aspx
PLEASE NOTE YOU SHOULD NOT BE CHARGED FOR THE SFP RECORD AS THESE ARE FREE AND YOUR HOSTING COMPANY SHOULD SET IT UP.. IF NOT WHY NOT!!