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

monologie

Registered
Apr 6, 2016
4
0
1
maroc
cPanel Access Level
Root Administrator
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
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,904
2,218
463
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:

Code:
exigrep [email protected] /var/log/exim_mainlog
Thank you.
 

monologie

Registered
Apr 6, 2016
4
0
1
maroc
cPanel Access Level
Root Administrator
Hello,

Thanks for the reply, when I send a test email to the following address: [email protected], I receive the following error in the file log (exim_mainlog)

Code:
2017-05-26 17:26:02 1dEH7p-0003hT-UI ** [email protected] R=dkim_lookuphost T=dkim_remote_smtp H=smtp.example.com [87.97.xxx.xxx]: SMTP error from remote mail server after RCPT TO:<[email protected]>: 550 Unrouteable sender address
 
Last edited by a moderator:

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,904
2,218
463
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.