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I am getting the error "Server response: 451 451 Temporary local problem - please try later" when sending password reminder emails via Laravel and Mailgun. I am running Laravel on VirtualBox.
I set up VirtualBox using Vagrant, would this have made a difference?
If I change the SMTP settings to my own host it works absolutely fine. Is there an issue with using Mailgun on a Virtual machine?
Update
I can send to Gmail addresses without any problems, however, they apparently are neither being blocked or allowed.
This is the error I get:
Failed: [email protected] → [email protected] Server response: 550 550
Verification failed for <[email protected]>
No Such User Here Sender verify failed
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Steps to Fix “Server Error: 451 Temporary Local Problem”Reset with the option >> Reset cPanel & WHM Exim configuration files, one option at a time, until the installed configuration is valid.
SMTP error 451 indicates when the user exceeds the limits set on the email server for sending emails. The email server will not allow the user to send more emails than the limits set on the email server; these limits are set as daily or hourly limits to restrict abusive behavior.
Permission and ownership errors of /etc and mail folders or other settings in the mail server configuration file can also cause error 451 during email delivery. In MailEnable, checking the database connectivity and permissions of files is important to resolve 451 error.
The error "451 Temporary local problem" comes from the actual mail server you are connecting to.
Typically, 451 errors are due to the receiving server rejecting your email. This can happen for a number of reasons but most likely is due to the recipients server being overloaded with messages. It can also mean that the recipients server has grey-listed the IP, and therefore delays the message until it can verify that the sending server is not trying to send spam. The receiving server may be offline as well.
Since this error message is so vague, you'll need to get more information from the recipient. I'd suggest waiting a few hours and try to send the email again.
It doesn't have to do with your Laravel installation or running with Virtualbox, further more because you tested with other SMTP settings.
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