SMTP Error 550 5.1.1 RESOLVER.ADR.RecipNotFound

IT Support Forum Forums Email Troubleshooting SMTP Error 550 5.1.1 RESOLVER.ADR.RecipNotFound

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    • #2416
      Webmaster
      Keymaster

      If you get the following SMTP error:

      Action: failed
      Status: 5.1.1
      Diagnostic-Code: smtp;550 5.1.1 RESOLVER.ADR.RecipNotFound; not found

      This is because either the email add your you are trying to sent to doesn’t exist, or the recipient’s mail server is misconfigured or blocking your email.

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