Overview
The ‘451 Temporary Local Problem’ issue often occurs on sites attempting to send emails through the Microsoft Outlook mailer. It indicates that the SMTP server is experiencing a temporary problem that prevents it from processing your email request.
Causes
This error typically occurs when:
- The SMTP server is undergoing maintenance or experiencing technical difficulties
- The server is overloaded with too many requests
- There are temporary network issues on the server-side
- Missing or incomplete DNS settings
Solution
To resolve this issue, we suggest:
- Waiting for a short period and then retrying to send your email
- Checking the SMTP provider’s status page or support channels for any reported issues
- Consider switching to an alternate SMTP server like SendLayer if the problem persists
Also, check that your DNS settings are properly set. Some mailers require updating your domain’s DNS settings when configuring your SMTP plugin. Make sure that you’ve added all the DNS records provided by your mailer.
If you’re using an SMTP plugin such as WP Mail SMTP, you may want to consider configuring a backup mailer to handle situations where your primary SMTP server encounters temporary problems.
That’s it! Now you know how to handle the ‘451 Temporary Local Problem’ error.
Want to explore other mailers WP Mail SMTP provides to improve email deliverability and ensure consistent email sending? Be sure to check out our complete guide to WP Mail SMTP mailers.