SMTP Error 550 5.1.1 RESOLVER.ADR.RecipNotFound

Posted on by Webmaster

Tagged: 5.1.1, Recipient Not Found, SMTP Error 550

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- December 4, 2019 at 3:49 pm #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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