How do I create an SPF record?
How to Build Your SPF Record in 5 Simple Steps
- Step 1: Gather IP addresses 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.
- Step 5: Test!
What is SPF MessageLabs com?
The Sender Policy Framework (SPF) is used to prevent spammers from sending messages on behalf of your domain. With SPF, publishing authorized mail servers enables end-users to validate incoming emails via a simple DNS lookup.
How do I add an SPF record to my domain DNS?
Adding a Customized SPF Record to a Domain (Advanced)
- Log in to the Account Control Center (ACC)
- Click Domains.
- Click Manage Your Domain Names.
- Click the domain name that you want to put an SPF record on.
- Click Manage Custom DNS Records.
- Click Add DNS Records.
- Next to Type Of Record, click the drop-down and select TXT.
How does SPF delegation work?
With SPF delegation, your records are compressed, and sometimes even your email providers are hidden from mail transfer agents to prevent SPF lookup failure. You only need to provide the list of IP addresses allowed, and the team will take care of creating the SPF records and compressing it if required.
Can you have 2 SPF records?
Don’t use multiple SPF records! A domain name MUST NOT have multiple records that would cause an authorization check to select more than one record. The rule of thumb: multiple SPF records will fail the SPF authentication.
Is SPF record necessary?
All domains, regardless if they send email, should include a Sender Policy Framework (SPF) record. SPF is a widely adopted mechanism that identifies legitimate sending IP addresses and is taken into account by mailbox providers when treating received email.
What is DNS SPF record?
A sender policy framework (SPF) record is a type of DNS TXT record that lists all the servers authorized to send emails from a particular domain. A DNS TXT (“text”) record lets a domain administrator enter arbitrary text into the Domain Name System (DNS).
Why SPF record is not enough?
SPF records have a DNS lookup limit This means that if your organization uses multiple third party vendors who send emails through your domain, the SPF record can end up overshooting that limit. Unless properly optimized (which isn’t easy to do yourself), SPF records will have a very restrictive limit.
How many entries can you have in an SPF record?
10
An individual SPF record is limited to 10 “include” lookups. This means your record cannot generate more than 10 references to other domains. This means that every “instance”, “a”, “mx”, “ptr”, “exists”, “redirect” will generate one lookup.
How long can a SPF record be?
255 character
Sender Policy Framework (SPF) records have a 255 character string limit in Domain Name System (DNS). If you have an SPF record with a string longer than 255 characters, you will fail the SPF authentication check.
Why is my SPF record not working?
Possible causes include: SPF hasn’t been set up for your domain. SPF isn’t set up correctly for your domain. There’s an issue with the DNS at your domain provider.
What if I have no SPF record?
An SPF record is a requirement for most email providers. If the record is not found, then the mailing list will most likely end up in the “Spam” folder. The same will happen if the SPF Record exists, but the IP address from which the message is sent is not present in the allowed list.
What happens if SPF record is missing?
Not having SPF (Sender Policy Framework) record for a domain may help an attacker to send spoofed email, which will look like, originated from the real domain. Not only that, but this will also result in land emails in the SPAM box when SPF missing.
Where do I set SPF record?
Instructions
- Log into your Account Center.
- Navigate to the Edit DNS Zone Page Edit DNS Zone Page Edit DNS Zone Page for your desired domain.
- Select the + Add Row button to create a new record. Set the type to TXT and enter your SPF record in the right column.
- Click Save to commit the changes.
Does SPF work without DMARC?
DMARC provides a policy which tells the receivers what to do with an email that fails email authentication. This policy is enforced by the receivers. There is no enforcement when SPF is used without DMARC.
What happens if SPF fails?
If SPF is in place, it will list all approved servers mail is allowed to come from. If that particular IP is not on the list, the SPF check will fail. SPF records can be broken down into two parts—qualifiers and mechanisms. Mechanisms can be set to describe who is allowed to send mail on behalf of a domain.
What happens if you have 2 SPF records?
Can You Have More than 1 SPF Record? No, you can’t have more than 1 SPF record. If you do have two separate SPF TXT record entries, your emails will fail SPF authentication and return a PermError. If you have multiple SPF records, the simple fix is to merge these entries into a single record.
Can I have 2 SPF records?
How many IP addresses can you have in an SPF record?
You can add as many IP addresses as needed to your SPF record up to the 255 character TXT record limit. If the number of IP addresses in your SPF record exceeds 255 characters, investigate different options to shorten your SPF record.
What happens if no SPF record?
Which is better SPF or DKIM?
In a nutshell, SPF allows email senders to define which IP addresses are allowed to send mail for a particular domain. DKIM on the other hand, provides an encryption key and digital signature that verifies that an email message was not forged or altered.