What does a 550 5.7.1 error mean in email delivery?
Summary
What email marketers say10Marketer opinions
Email marketer from Email on Acid shares that the 550 5.7.1 error is often due to a low sender reputation, indicating that the sending server is viewed as untrustworthy by the receiving server. This could be due to sending spam-like content, or sending to unengaged recipients.
Email marketer from Reddit user explains that a common cause of 550 5.7.1 is missing or incorrect SPF/DKIM records, which makes the receiving server suspicious of the email's origin.
Email marketer from Stack Overflow responds that 550 5.7.1 error signifies that the sender lacks proper authorization to send emails through the recipient's server, often due to SPF, DKIM, or DMARC misconfigurations.
Marketer from Email Geeks shares the SFR postmaster email address cellule-abuse@sfr.com for contact.
Email marketer from Sendinblue explains that a 550 5.7.1 error generally points to a problem with the sender's email setup, such as incorrect SPF or DKIM records, leading to the email being blocked.
Marketer from Email Geeks explains that 550 5.7.1 errors usually refer to a lack of SPF, DKIM, or DMARC records and asks for more information about the domain being used.
Email marketer from Postmark says a 550 5.7.1 error signals a generic rejection, possibly due to spam filtering, authentication failures, or reputation issues.
Email marketer from Email Deliverability Forum suggests checking sender reputation, ensuring correct email authentication (SPF, DKIM, DMARC), and avoiding spammy content as troubleshooting steps for a 550 5.7.1 error.
Email marketer from DigitalOcean says that SMTP error code 550 5.7.1 typically means the message was rejected because it violates a policy or a spam filter.
Email marketer from Mailjet shares that a 550 5.7.1 error is a general rejection message, often meaning the recipient server suspects spam or the sender doesn't have permission to send to the recipient.
What the experts say2Expert opinions
Expert from Word to the Wise shares that a 550 5.7.1 error means the email was rejected due to a generic policy violation. Check the details of the error message for specific clues.
Expert from Spam Resource explains that a 550 5.7.1 error indicates a permanent failure, meaning the receiving mail server has refused to accept the message. The exact cause varies but often relates to sender authentication problems or spam filtering policies.
What the documentation says4Technical articles
Documentation from cPanel Documentation says that a 550 5.7.1 error means the email was rejected because the server doesn't accept mail from the sender's domain or IP address, or the sender is listed on a blocklist.
Documentation from SparkPost reports that the 550 5.7.1 error is a general rejection code, which can be caused by various factors, including spam filtering, sender reputation problems, or authentication issues.
Documentation from Google Workspace Admin Help says that the 550 5.7.1 error typically indicates a problem with the sender's email configuration, reputation, or authentication, causing the recipient server to reject the message.
Documentation from Microsoft Docs explains that 550 5.7.1 indicates a general delivery refusal, often due to sender restrictions or policy reasons on the recipient's side.