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Portal Home > Knowledgebase > E-mail > 421 Unexpected failure


421 Unexpected failure




Error's trying to send emails.

If you are trying to send emails and get a message like:


421, response: Unexpected failure, please try later

It's possible it could be a temporary issue. a good indication would be If the message says:

"No action is required on your part. Delivery attempts will continue for some time, and this warning may be repeated at intervals if the message remains undelivered. Eventually the mail delivery software will give up, and when that happens, the message will be returned to you.

This would indicate the receiving email may have problems.


If you experience this error every time you try and send an email, please contact Customer Support so we can test your email and POP client settings.



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