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SPF stands for Sender policy framework, SPF is used to prevent your domain from spoofing and outgoing message from being marked as spam. SPF provides access to email servers that have permission to send email for your domain.
At receiving side mail server use SPF to ensure that incoming message delivered from your domain were send by a authorized server. Any organization don't use SPF and send bulk message from their domain name, it will be considered or marked as a spam on the mail server of reciever end. SPF facilitates a tons of security to your domain and make sure the outgoing message is delivered from your domain. With SPF, setup DMARC and DKIM and prevent your domain from phishing, spoofing and spamming.
SPF provides a robust email protection and ensures that the email is delivered from the expected domain. We can say that SPF does not work correctly, when it is integrated with DKIM and DMARC, it gives a new definition to email security. The SPF record is treated as a public list where everyone is aware from where you send your email. If you send an email and it doesn't match any of the records in the entire list, the receiving party marks the email as spam.
Let's take a look at how SPF proves to be important for email
SPF plays an important role of security for email domain, no attacker will be able to attack your domain for the purpose of sending spam email. When you prevent your domain from global blacklisting, it will automatically increase your email delivery.
Have a SPF authentication, your domain gets high reputation and towards another server or blacklisted server shows that we are very dedicated for email security. this greatly decreased the chances of outgoing emails being marked as spam and helps to get better positioning inside cyber security and firewall.
In SPF record, verify a IP address of sender compared with the domain order and this will help prevent phishing and spoofing.
SPF email policies, first deploy SPF records in the DNS. The record is a list contains all IP address that are permit to send a email on a behalf of domain. In SPF mechanism , it takes a domain in the return-path address to recognize SPF record.
When a sender tries to hand over email to the server "receiving" email for delivery, the server checks to see if the sender is on the domain's list of allowed senders. If so, a link has been established between the email fragment and the email domain. If not, the server continues to process the email as usual without this link, as several things could be going on.
SPF split into a two section- mechanism and qualifiers
Mechanism:Mechanism is kept to decide that who allowed to send email on a behalf of a domain. If condition would be match, one of four qualifier can be adapted.
Qualifier: The qualifier works as a result following when the mechanism is matched. If no qualifier is getting listed, the result defaults to +, see in below image
v=spf1 a ip4:22.214.171.124/28 include:marketingemailserver.com ~all
You see in the above example, the SPF mechanism allows both IP addresses and domain names to be sent email. Meanwhile, if the email comes from another domain name it is marked as SPF softail.
If you have an access to the DNS server used by your mail server. you may see TXT records beginning with "v=spf". I disclose a another way to check any of domain using mxtoolbox tool.
Even if you don't have an SPF record before, but you have to follow some step at the time of creating SPF record. For make changes, you should know some essential information like hostname or IP address of your mail server, a list of IP address to whom you allow to send a email, location and login detail of DNS server.
Yes. Migomail implements and adheres to email authentication standards including SPF. In fact, all email we deliver for our users is required to be authenticated. Configuring it is an important step for verifying sending domains when you set up a new Migomail account.
Migomail's Validator is part of our free email tools for developers. It’s the easiest way to verify your messages have working DKIM signatures.
Read more about DKIM best practices
Learn more about SPF with these resources from Migomail’s email experts and elsewhere on the web.
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