Why Are My Emails Going to Spam? A Simple Fix to Protect Your Reputation.

Ever sent an important email, only to find out it landed in the recipient's spam folder? It's a common and frustrating problem that can make your business look unprofessional and cost you customers. Often, the reason your emails are treated as spam has nothing to do with what you've written, but with a simple security setting that hasn't been configured.

This guide will walk you through a straightforward, one-time fix called an SPF record. We'll explain in simple terms what it is, why it's essential for your business's reputation, and how it helps ensure your emails arrive in the inbox where they belong.

What is an SPF Record?

An SPF record is a type of DNS (Domain Name System) record that specifies which mail servers are authorized to send emails on behalf of your domain. Think of it as a public guest list for your email. When another mail server receives an email that appears to be from your domain, it can check your SPF record to verify that the email was sent from an approved server.

This authentication process helps to prevent email spoofing, a common tactic used by spammers and phishers where they forge the "from" address of an email to make it appear as if it's coming from a legitimate source—your domain.

Why Are SPF Records So Important?

Implementing a properly configured SPF record offers several key benefits:

• Combats Email Spoofing and Phishing: By clearly defining which servers are permitted to send emails for your domain, you make it significantly harder for malicious actors to impersonate your brand and send fraudulent emails to your customers, partners, or employees.

• Improves Email Deliverability: Major email providers like Gmail, Outlook, and Yahoo! check for SPF records as part of their spam filtering processes. Emails that pass an SPF check are less likely to be marked as spam, which means more of your legitimate emails will land in the recipient's inbox.

• Protects Your Domain's Reputation: A domain that is frequently associated with spam can have its reputation damaged, leading to legitimate emails being blocked or filtered. A strong SPF policy helps to safeguard your domain's reputation.

• DMARC Compliance: SPF is a key component of DMARC (Domain-based Message Authentication, Reporting, and Conformance), an email authentication protocol that provides another layer of protection against email spoofing.

How Do SPF Records Work?

The process of an SPF check is straightforward:

1. Email is Sent: A mail server sends an email that claims to be from your domain (e.g., you@yourdomain.com).

2. Receiving Server Performs a DNS Lookup: The receiving mail server performs a DNS lookup to find the SPF record for yourdomain.com.

3. SPF Record is Checked: The receiving server examines the SPF record to see if the IP address of the sending server is listed as an authorized sender.

4. Action is Taken:

   • If the IP address is listed, the SPF check passes, and the email is likely to be delivered.

   • If the IP address is not listed, the SPF check fails. The receiving server will then handle the email according to its own policies and the instructions in your SPF record, which could mean rejecting the email or marking it as spam.

The Structure of an SPF Record

An SPF record is a simple line of text added to your domain's DNS as a TXT record. Here's the standard record we use for our clients:

v=spf1 include:spf.stackmail.com a mx -all

Let's dissect the components:

• v=spf1: This is the version of SPF being used. It's always the first part of the record.

• include:spf.stackmail.com: This mechanism authorizes our email provider (Stackmail) to send emails on your behalf. If you use other third-party services like Mailchimp, they would also need to be included.

• a: This mechanism authorizes the server with the same IP address as your domain's A record (your website) to send email.

• mx: This authorizes the mail servers specified in your domain's MX records to send email.

• ~all (Soft Fail) or -all (Hard Fail): This is a crucial part of the record that tells the receiving server what to do with emails from servers not listed in your SPF record.

  • ~all (Soft Fail): This qualifier suggests that emails from non-authorized servers should be accepted but marked as suspicious or spam. This is a good starting point for some setups.

  • -all (Hard Fail): This is a stricter rule that tells the receiving server to reject emails from any server not listed in your SPF record. We use this because it offers the strongest protection against spoofing.

How to Create and Implement an SPF Record

1. Identify Your Sending Sources: Make a list of all the servers and services that send email on behalf of your domain. This includes your own mail server (e.g., Microsoft Exchange), your web server, and any third-party services for newsletters, transactional emails, or marketing campaigns.

2. Construct Your SPF Record: Start with v=spf1 and add the appropriate mechanisms for your sending sources.

   • For your own servers: Use a and mx.

   • For third-party services: Use the include: mechanism with the domain provided by that service.

3. Choose Your "all" Mechanism: Decide whether to use ~all (soft fail) or -all (hard fail). We recommend -all for maximum security once you are confident all your sending sources are listed.

4. Publish the SPF Record in Your DNS:

   1. Log in to your domain registrar or DNS hosting provider's control panel.

   2. Navigate to the DNS management section.

   3. Create a new TXT record.

   4. In the "Host" or "Name" field, enter @ (which represents your root domain).

   5. In the "Value" or "Content" field, paste your complete SPF record.

   6. Save the record.

DNS changes can take up to 48 hours to propagate fully across the internet.

Common Mistakes to Avoid

• Multiple SPF Records: A domain must have only one SPF record. If you have multiple TXT records starting with v=spf1, it will cause validation errors. If you need to add a new sending source, you must edit your existing SPF record, not create a new one.

• Exceeding the 10-DNS-Lookup Limit: An SPF record cannot generate more than 10 DNS lookups. Each include, a, mx, ptr, and exists mechanism, as well as the redirect modifier, counts as a lookup. If you use many third-party services, you may need to "flatten" your SPF record.

• Incorrect Syntax: Even a small typo can invalidate your entire SPF record. Double-check your syntax before publishing.

By taking the time to understand and correctly implement SPF records, you are taking a significant step in securing your email communications, protecting your brand's reputation, and ensuring that your important messages reach their intended recipients.

A Note for our Customers here at TWG

If you host your website with us and use our nameservers, you can relax! We automatically add and manage a correctly configured SPF record for your domain by default. The record includes spf.stackmail.com to authorize our email servers and uses the strict -all (Hard Fail) policy to provide you with the best possible protection against spam and phishing attacks. This is just one of the ways we help ensure your email is secure and professional right from the start.