554 error email refused

The infamous "554 error"!

A 554 error is a type of email delivery error that indicates that the recipient's email server has refused to accept the email. The error message is usually accompanied by a brief explanation, such as "554 Transaction failed: Recipient address rejected".

Here are some common reasons why you might receive a 554 error:

  1. Invalid recipient email address: The email address you're trying to send to is invalid, non-existent, or not properly formatted.
  2. Recipient's email server is down or experiencing issues: The recipient's email server is temporarily unavailable or experiencing technical difficulties, preventing it from accepting emails.
  3. Recipient's email account is full or quota exceeded: The recipient's email account has reached its storage limit, and the email you're trying to send is too large to be accepted.
  4. Recipient's email server is blocking your IP address: The recipient's email server has blocked your IP address due to suspected spamming or other security concerns.
  5. Email content is flagged as spam: The email content is flagged as spam by the recipient's email server, and it's being rejected as a result.
  6. Email authentication issues: There's an issue with the email authentication process, such as a missing or incorrect SPF record, DKIM signature, or DMARC policy.

To resolve a 554 error, you can try the following:

  1. Check the recipient's email address: Verify that the email address you're trying to send to is correct and properly formatted.
  2. Check the recipient's email server status: Check the status of the recipient's email server to see if it's experiencing any issues.
  3. Check the email content: Review the email content to ensure it's not flagged as spam and that it complies with the recipient's email policies.
  4. Check email authentication settings: Verify that your email authentication settings are correct and up-to-date.
  5. Contact the recipient's email administrator: If none of the above steps resolve the issue, you may need to contact the recipient's email administrator to resolve the issue.