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Remote mail exchanger SMTP-error (550)

mortenmathiasen
A new cpanel client having domain clientdomain.dk already uses gmail. To continue using gmail the domains mail exchanger is set to 'Remote mail exchanger' within cpanel. All fine, but it introduces an error when sending mails from within cpanel webmail: SMTP-error (550): Could not add recipient "username@clientdomain.dk" (The mail server could not deliver mail to username@clientdomain.dk. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.)
I have checked the exim log regarding this: exigrep username@clientdomain.dk /var/log/exim_mainlog 2021-07-15 03:23:05 H=(webhost1.hostingdomain.dk) [::1]:42614 F= A=dovecot_login:support@hostingdomain.dk rejected RCPT : The mail server could not deliver mail to username@clientdomain.dk. The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.
Anyone having an idea on how to solve this problem?

Comments

5 comments

Date Votes
  • cPRex Jurassic Moderator
    Hey there! Is the domain's MX record also pointed to Gmail? If not, the DNS would still route that back to the local system.
    0
  • mortenmathiasen
    Yes, the MX records point to Gmail: clientdomain.dk. 14400 IN MX 1 aspmx.l.google.com. clientdomain.dk. 14400 IN MX 5 alt2.aspmx.l.google.com. clientdomain.dk. 14400 IN MX 5 alt1.aspmx.l.google.com. clientdomain.dk. 14400 IN MX 10 aspmx2.googlemail.com. clientdomain.dk. 14400 IN MX 10 aspmx3.googlemail.com. clientdomain.dk. 14400 IN MX 20 clientdomain.dk.
    These records work just fine outside cPanel. Inside cPanel Exim reports this error: fail_remote_domains: driver = redirect domains = ! +local_domains : ! localhost : ! localhost.localdomain allow_fail data = ${if eq {$verify_mode}{S} \ {:fail: The mail server does not recognize $local_part@$domain as a valid sender.} \ {:fail: The mail server could not deliver mail to $local_part@$domain. The account or domain may not exist, they may be blacklisted, or missing \ the proper dns entries.} \ }
    From this it seems that any remote domain will fail upon standard Exim setup?
    0
  • cPRex Jurassic Moderator
    I'd recommend checking two things. The first, would be a "dig mx clientdomain.dk" from the cPanel server's command line, just so you can confirm your local server is reading those MX records properly. The second thing would be to check the cPanel >> Track Delivery tool to see if that shows any odd routing.
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  • mortenmathiasen
    SOLVED! The MX records were not available to Exim. After setting up a DNS-forwarder pointing to cPanels DNS everything works great. :) [root@hostingdomain ~]# dig clientdomain.dk MX +short 5 alt1.aspmx.l.google.com. 10 aspmx3.googlemail.com. 5 alt2.aspmx.l.google.com. 1 aspmx.l.google.com. 10 aspmx2.googlemail.com.
    Thanks a lot!
    0
  • cPRex Jurassic Moderator
    I'm glad I could help get things on the right track!!
    0

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