SMTP Error: [550] 5.7.1 This message is rejected by our SPAM filters

General
1

Hello Team,

I am trying to send an email then I am getting the below error while clicking on the Send button.

SMTP Error: [550] 5.7.1 This message is rejected by our SPAM filters. Please refer http://support.mailhostbox.com/email-administrators-guide-error-codes/ for more information

2

I don’t think Cloudflare’s email forwarding service has spam filters. This must be an external issue.

3

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