SPF stands for Sender Policy Framework. An SPF Record Check verifies the legitimacy of an email sender. For this, it relies on the SPF record, a type of record published in a domain’s DNS (Domain Name System) and used to identify the authorized email servers for that domain.
Once you put the SPF record in Smartlead’s SPF Record Check Tool, the system will retrieve the SPF record published in the domain’s SPF. The tool also analyses the SPF record for errors or syntax mistakes that might prevent it from working correctly.
This tool will give you easy-to-understand feedback on whether the SPF record is configured correctly and if it effectively authorises email senders for the specific domain.
An SPF record (Sender Policy Framework record) is a type of record published in a domain's DNS (Domain Name System) that acts as a security shield against email spoofing. It defines authorized email senders for a particular domain.
Here's how it works:
1. A domain owner creates an SPF record within their domain's DNS. This record lists IP addresses or mail servers allowed to send emails on behalf of that domain.
2. The receiving email server acts like a security guard when an email arrives. It checks the SPF record of the sender's domain to see if the email originated from an authorized source.
3. The receiving server compares the email's sender IP address against the list in the SPF record. If the IP address matches an authorized one, the email is considered more likely legitimate and allowed to pass through. But if there's no match, it raises a red flag!
Properly configured SPF records can help prevent email spoofing, protect your reputation, and enhance email deliverability.
Record
Type
Value
Time to live (TTL)
WWW
CNAME
abc.com
3600
Below is an example of an SPF record that allows emails from Google Workspace servers.
Breakdown of Components:
v=spf1:
v=: Identifies this as an SPF record.
spf1: Specifies the SPF version (1 is the current standard).
include:_spf.google.com:
include: This mechanism tells the receiving server to consult another SPF record for authorization.
_spf.google.com: This is a subdomain commonly used by Google Workspace to specify their authorized sending servers.
ip4:192.168.0.1:
ip4: This mechanism authorizes a specific IP address version (4 in this case).
192.168.0.1: This is the actual IP address allowed to send emails for this domain.
~all:
~: This is a qualifier, indicating a "soft fail."
all: Refers to any sender not explicitly authorized in the record.
Together: This translates to "if the email doesn't come from Google Workspace servers, the specific IP, or any other explicitly allowed source, deliver it with a spam flag."
An SPF record (Sender Policy Framework record) is a record published in your domain's DNS that specifies authorized email senders for your domain. It acts like a security guard, preventing email spoofing, where scammers disguise their emails to appear from your domain. SPF helps protect your reputation, improve email deliverability, and avoid phishing attacks.
An SPF record lookup is done using a free online tool like Smartlead’s SPF Record Tool. These tools retrieve the SPF record published in a domain's DNS and analyze it for errors. They provide feedback on whether the record is configured correctly and effectively authorizes email senders for that domain.
Improved Email Security: Ensures your SPF record is valid, helping prevent email spoofing.
Troubleshooting: Helps identify problems with your SPF record if you have email delivery issues.
Peace of Mind: Provides confidence that your SPF record is functioning correctly.
While understanding the basics is helpful, you don't necessarily need to be a tech expert. Many domain registrars and email service providers offer user-friendly interfaces or instructions to help you set up and manage SPF records. You can also use online resources and tutorials for guidance.
You can find your SPF record by querying your domain's DNS records using online tools or commands like dig or nslookup. Look for the TXT record associated with your domain, which contains your SPF record detailing authorised email servers.
Using the Smartlead SPF Generator is simple. Enter your domain name in the provided field, and our tool will guide you through the process of defining the IP addresses authorised to send emails for your domain. Once complete, you'll receive a valid SPF record that can be added to your DNS as a TXT record.
To configure an SPF record generator effectively, you need your domain name and a clear understanding of which IP addresses or domains should be authorized to send emails on behalf of your domain.
Yes, you should update your SPF record whenever you change email providers or add new authorised sending servers. This ensures that your SPF record accurately reflects the servers allowed to send emails on behalf of your domain.
Common mechanisms in SPF records include:
include: Includes SPF records from other domains
a: Authorises domain's A records (IPv4 addresses)
mx: Authorises domain's MX records (mail servers)
ip4/ip6: Specific IPv4 or IPv6 addresses
all: Specifies handling for emails not matching previous mechanisms (+, -, ~).
No, you should have only one SPF record per domain. Multiple SPF records can cause conflicts and DNS lookup issues, potentially leading to email delivery problems.
If your SPF record fails a test, review the mechanisms and syntax for errors. Ensure all authorized servers are correctly listed. Update and re-publish the SPF record in your DNS. Use SPF testing tools to verify corrections.
You can configure SPF for subdomains by creating a separate SPF record for each subdomain. Use the include mechanism to reference the main domain's SPF record if the subdomain shares the same email servers.
SPF records have limitations such as:
- Inability to protect against all types of email fraud.
- Complexity in managing IP addresses and third-party services.
- Dependency on DNS propagation times.
- Potential for misconfiguration leading to email delivery issues.