550-Unrouteable address – What causes it and how to fix it in Exim, cPanel

monologie

• May 24, 2017 14:50

Hi everyone, I can't send mails to certain email addresses (.net, .org), I receive the next message. [Removed Output that included real domain names] Diagnostic-Code: smtp; 501 5.0.1 Emetteur invalide. Invalid Sender. LPN007_405 Does anyone know how I can resolve these error? Many thanks

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  cPanelMichael

  • May 24, 2017 19:52

  Hello, Is this happening when sending email from your cPanel server to multiple remote mail servers? If so, do you notice any output in /var/log/exim_mainlog for the affected messages? EX:
  exigrep user@remote-domain /var/log/exim_mainlog
  Thank you.

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  monologie

  • May 26, 2017 15:31

  Hello, Thanks for the reply, when I send a test email to the following address: user@example.net, I receive the following error in the file log (exim_mainlog)
  2017-05-26 17:26:02 1dEH7p-0003hT-UI ** user@example.net R=dkim_lookuphost T=dkim_remote_smtp H=smtp.example.com [87.97.xxx.xxx]: SMTP error from remote mail server after RCPT TO:: 550 Unrouteable sender address
  

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  cPanelMichael

  • May 29, 2017 15:53

  Hello, That message suggests the email account you are sending to is not routable. To clarify, are you sending to this email account from your server, or is this domain name hosted on your server? Thank you.

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  monologie

  • May 30, 2017 14:46

  Hello, I send email from my server to the customer address: user@example.net. And I receive the following error in the file log (exim_mainlog).
  SMTP error from remote mail server after RCPT TO:: 550 Unrouteable sender address
  

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  Infopro

  • May 30, 2017 15:07

  That domain, now removed from your posts, is a disposable email address website. You might want to contact your customer and ask them for another email address that actually works.

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