The SPF record check validation tool allows users to determine whether some SPF record exists in type “TXT” of the subject domain or host's DNS records.
The check SPF record validation is done by validating the format of SPF records of the domain and determining if the data is valid and should be working.
To validate or test the SPF records. Perform the following steps.
SPF stands for Sender Policy Framework. It's a TXT record added to a domain DNS record for DNS info that specifies the IP addresses allowed to send emails on behalf of the domain. It enables the domain to announce the list of approved senders publicly.
The SPF record lookup does not validate against the From domain. Instead, it looks at the Return-Path to validate the originating server. Return-Path is the mailing address that receiving mail servers use to notify the problems like delivery problems to the sending mail servers. Therefore, your email can pass the SPF validation even if From address is fake. The only limitation is that the recipient sees the From address in its email client.
So if the message fails SPF validation, there is no guarantee that it will not be delivered. The receiving ISP (Internet Service Provider) makes the final decision. Therefore, an SPF record check is one of the many factors determining whether an email should be delivered. However, when verifying the From address, the DMARC check is relatively more reliable than SPF.
The battle against spam and email scam continues. With time, several standards have developed to stop that practices. Sender Policy Framework or SPF is one of those standards.
SPF record determines which email servers are authorized to send the email(s) on the domain's behalf. Results in preventing spoofing and phishing attacks against the email domain. The SPF record describes the DNS record in a particular format to list all the hosts allowed to send the emails on the domain's behalf.
An email can be delivered without SPF validation. Check SPF record is not a perfect solution or ultimate problem resolver. However, combined with DKIM and DMARC, it can improve your email delivery rate and prevent abuse.
SPF check online is a relatively simple process. Suppose an email server receives the message and checks its Return-Path. Suppose that path is [email protected]. The following steps occur to perform the SPF lookup or validate the SPF record.
Implementing an SPF record is an easy process. It's a TXT record that you need to add to your domain DNS record. One common mistake people usually make setting multiple SPF TXT entries in their DNS records, making it challenging for the receiving server to know which SPF record is the definitive one. That results in failing SPF check online.
So, whenever you want to add the SPF TXT record for the new server. Always make sure to delete the existing SPF record entry. Just add the new service to that entry.
An SPF syntax looks like this:
v=spf1 include:_spf.google.com ~all
v=spf1 is the version of the SPF record being used followed by one or mechanisms. The following mechanisms are checked left to right, specifying different rules on how SPF is checked for the domain.
v=spf1 include:send.aweber.com ~all
v=spf1 include:amazonses.com ~all
v=spf1 include:spf.messagingengine.com ?all
v=spf1 include:_spf.google.com ~all
v=spf1 a mx include:secureserver.net ~all
v=spf1 include:u123456.wl.sendgrid.net -all
v=spf1 include:spf.mandrillapp.com ?all
v=spf1 include:spf.protection.outlook.com -all
v=spf1 include:mailgun.org ~all
v=spf1 include:spf.mailjet.com ~all
v=spf1 include:_spf.mlsend.com ~all
v=spf1 include:emailsrvr.com ~all
v=spf1 include:zoho.com -all
v=spf1 include:mail.zendesk.com ?all