An “Email Delivery Failed – Retry Timeout Exceeded” message occurs when a sending mail server attempts to deliver an email multiple times but does not receive a successful response from the recipient’s mail server within the permitted retry period. During this time, the sending server continues to retry delivery automatically before eventually returning the message as undeliverable.
This error is usually caused by temporary issues on the recipient’s mail server, such as downtime, greylisting, network delays, or mailbox restrictions. In many cases, the issue resolves itself once the receiving server becomes available again. This guide explains how to identify the cause and what steps to take when this error occurs on a Domains.co.za email account.
TABLE OF CONTENTS
How to Resolve Email Delivery Failed Retry Timeout Exceeded Errors
1. Open the bounce-back or failure notification email sent to the sender.
2. Review the error message and confirm it contains wording such as Retry timeout exceeded or Delivery failed after multiple attempts.
3. Verify that the recipient’s email address is spelled correctly and still active.
4. Ask the recipient to confirm that their mail server is online and accepting incoming mail.
5. Wait at least 30 to 60 minutes before attempting to resend the email.
6. If the email includes large attachments, remove them and resend the message.
7. Login to your Domains.co.za account.
8. Access your hosting service and log in to cPanel.
9. Navigate to Track Delivery or Email Deliverability.
10. Review the delivery logs to confirm whether the message was deferred or rejected.
11. Contact Domains.co.za support if delivery continues to fail after several retry attempts.
How to View Email Delivery Logs in SpamExperts
You can also check the Delivery Issue log within SpamExperts which all clients should have access to as per below:
1. Login to your SpamExperts Control Panel.
2. Navigate to the Incoming or Outgoing section.
3. Select Delivery Failure Details or Delivery Issue Log.
4. Every failed attempt is logged with information useful for diagnosis, such as SMTP error codes (e.g., 4xx for temporary failures, 5xx for permanent failures). The logs are stored for 28 days.
5. The Delivery Data field in the log search results will display the destination mail server’s most recent response, which may indicate if the message was accepted or rejected by your local server.
Additional Information
- Retry timeout errors usually indicate a temporary issue on the recipient’s mail server rather than a problem with the sender’s configuration.
- Many mail servers intentionally delay messages using greylisting as an anti-spam measure, which can trigger retry attempts.
- Large attachments increase message processing time and may cause repeated delivery failures.
- These errors are not typically related to blacklisting or spam filtering.
- Mail servers retry delivery automatically before returning a failure notice.
- Sending smaller, text-based emails improves delivery reliability.
- Repeated failures over an extended period may indicate recipient-side misconfiguration.
Login to Domains.co.za Account
1. Go to the Domains.co.za website Account Login page.
2. Enter your Email and Password and click the Sign In button.
3. You will see the Domains.co.za Dashboard, displaying the Manage Account menu on the left and your Account Information, Account Overview and Open Support Tickets on the right.
