How Do SPF Records Work?

How does SPF work?

The key technical detail with SPF is that it works by looking at the domain of the Return-Path value included in the email’s headers.

The receiving server extracts the domain’s SPF record, and then checks if the source email server IP is approved to send emails for that domain.

How do I use an SPF record?

Follow these five simple steps.

  • Step 1: Gather IP addresses that are used to send email. The first step to implement SPF is to identify which mail servers you use to send email from your domain.
  • Step 2: Make a list of your sending domains.
  • Step 3: Create your SPF record.
  • Step 4: Publish your SPF to DNS.

What is SPF record check?

Check the SPF record of any domain

Our SPF record check will verify that a domain has published a valid record. Sender Policy Framework (SPF) is an important factor in email authentication.

How many SPF records can you have?

Per the RFC, SPF records have a 255-character limit for a single string. This is an inherent limit of DNS TXT records.

Why SPF record is important?

Why it is Important to Create a SPF (Sender Policy Framework) Record. SPF records prevent sender address forgery by protecting the envelope sender address, allowing the domain administrator to specify which mail server are allowed to send mail from their domain.

How do I add SPF records?

Adding an SPF Record to a Domain

  1. Log in to the Account Control Center (ACC)
  2. Click Domains.
  3. Click Manage Your Domain Names.
  4. Click the domain name that you want to put an SPF record on.
  5. Click Manage Custom DNS Records.
  6. Click Add DNS Records.
  7. Next to Type Of Record, click the drop-down and select TXT.
  8. Click Proceed.

Does SPF prevent spoofing?

A carefully tailored SPF record will reduce the likelihood of your domain name getting fraudulently spoofed and keep your messages from getting flagged as spam before they reach your recipients. Sender Policy Framework (SPF) is an email validation system designed to prevent spam by detecting email spoofing.

What is SPF record in DNS?

A Sender Policy Framework (SPF) record is a type of Domain Name System (DNS) record that can help to prevent email address forgery. Adding an SPF record can help prevent others from spoofing your domain. You can specify which mail servers are permitted to send email on behalf of your domain.

What does all mean in SPF record?

An SPF record is a Sender Policy Framework record. It’s used to indicate to mail exchanges which hosts are authorized to send mail for a domain. It’s defined in RFC 4408, and clarified by RFC 7208.

Who is IP lookup?

The IPWHOIS Lookup tool displays as much information as possible for a given IP address, sourced from the Regional Internet Registry (RIR) to which the address belongs. A RIR is an organization that manages the allocation and registration of Internet number resources within a particular region of the world.

How do I find my SPF record?

You can manually check the Sender Policy Framework (SPF) record for a domain by using nslookup as follows:

  • Open Command prompt (Start > Run > cmd)
  • Type “nslookup -type=txt” a space, and then the domain/host name.
  • If an SPF record exists, the result would be similar to:

Can I have more than 1 SPF record?

Use an SPF record with multiple servers

A domain can have only one SPF record. Don’t create an SPF record for each mail server.

How long can an SPF record be?

Strings in SPF and TXT records should be no longer than 255 characters. However to get around this limitation, per RFC 4408 a TXT or SPF record is allowed to contain multiple strings, which should be concatenated together by the reading application.

What should an SPF record include?

Create an SPF rule

The following list shows how each part of the record is defined: v=spf1 : Sets the SPF version that is used. mx : Allows the domain’s MX details to send email. : Includes Google Mail servers as authorized servers.

Does SPF record need quotes?

You do NOT need to put double quotation marks ( ” ) around SPF records when created as either an SPF record or a TXT record. The DNS back-end ensures that quotes are simulated.

What is SPF SoftFail?

~ SoftFail, an IP that matches a mechanism with this qualifier will soft fail SPF, which means that the host should accept the mail, but mark it as an SPF failure. ? Neutral, an IP that matches a mechanism with this qualifier will neither pass or fail SPF.

Where do I put SPF record in DNS?

Adding an SPF record

  1. Log in to your account.
  2. Click on the MY DOMAINS button, located on the top right hand corner.
  3. Click on the domain name you wish to create an SPF record for.
  4. Click Manage DNS Records, in the DNS column.
  5. Here you will add the desired SPF record, provided by your host. Select TXT in the Type drop-down menu.

How do I change my SPF record?

Change an SPF record

  • Click a domain name in the list below to go to its DNS Management page.
  • On the DNS Management page, in the Records section, click the (pencil icon) next to TXT.
  • Make any changes to the record, and click Save when finished.

How do I create a DKIM key?

Create a DKIM TXT record

  1. Choose a simple, user-defined text string to be your DKIM selector.
  2. Generate a public-private key pair by using a tool such as ssh-keygen on Linux or PuTTYgen on Windows.
  3. Log in to the Cloud Control Panel.
  4. In the top navigation bar, click Select a Product > Rackspace Cloud.
  5. Select Networking > Cloud DNS.