If you receive a 421 Unexpected failure whilst atempting to send an email it could just be a temporary issue and nothing to worry about, it will resolve itself in a few moments. It may look something like this… 421, response: Unexpected failure, please try later However if the message looks something like this… No [...]
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Why do I get 451 errors while sending Email?
If you receive a 451 error message it usually indicates that your email is misconfigured. First you would need to double check that you are using the correct outgoing SMTP settings. If you are sure that everything is set correctly, and you are still experiencing problems, please contact us.
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