How to Fix an Email Rejected Because of an SPF Violation
Question details
The user is unable to send emails because their messages are bouncing back with a 550 SPF violation error.
- Product
- Email Service / DNS
- Device & OS
- not provided
- Scenario
- Attempting to send an email to a recipient whose mail server strictly enforces Sender Policy Framework (SPF) authentication.
- Observed behavior
- The recipient server rejects the email, stating a 550 SPF violation, indicating that the sending server is not authorized by the sender domain's SPF record.
Confirm whether you are using a personal email or a corporate domain. Resolving SPF violations requires access to the sending domain's DNS management console, which is typically handled by an IT administrator.
Update the Domain's SPF Record
Authorize your email sending service by adding its IP address or include tag to your domain's SPF record via your DNS provider.
A 550 SPF violation occurs when the server sending the email is not explicitly listed in the domain's SPF (Sender Policy Framework) TXT record. Updating this record tells recipient servers that the sender is legitimate.
Compile a list of all IP addresses, email servers, and third-party services (like Mailchimp, SendGrid, or Microsoft 365) that are authorized to send emails on behalf of your domain.
Log in to your domain registrar's control panel (e.g., GoDaddy, Cloudflare, Namecheap) and navigate to the DNS Settings or Advanced DNS management page.
Locate the TXT record that begins with 'v=spf1'. Edit this record to include the missing sending service by adding the appropriate 'include:domain.com' or 'ip4:address' tags provided by your mail host.
Save the updated TXT record. Ensure you only have one SPF record per domain, as multiple SPF records will cause further authentication failures.
Correct Mail-Routing and Forwarding Configurations
Fix issues where emails are forwarded through intermediary servers that break SPF authentication.
Try WPS Office While Resolving Your Email Issues
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- 1. Download the installer: Visit the official WPS Office website and click the free download button for your operating system.
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Frequently Asked Questions
What does a 550 SPF violation mean?
A 550 SPF violation is an SMTP bounce error indicating that the recipient's email server rejected your message. It happens because the IP address of the server that sent the email is not authorized by your domain's SPF (Sender Policy Framework) DNS record.
How can I check if my SPF record is valid?
You can use free online SPF lookup and validation tools (like MxToolbox or Google Admin Toolbox). Simply enter your domain name, and the tool will display your current SPF record and flag any syntax errors or missing includes.
Can I fix an SPF violation if I don't own the domain?
No. If you are using a corporate email or a third-party domain address, you cannot fix this yourself. You must contact your company's IT support or domain administrator so they can update the DNS records.
Why did this SPF error start happening suddenly?
This often occurs if your company recently switched email hosting providers, started using a new marketing platform (like Mailchimp) without updating the DNS, or if the recipient's mail server recently adopted stricter DMARC/SPF authentication policies.
