You may have gone through the issue of not receiving mails on the server while the mail sending part functioning normally. In such cases the mail log (/var/log/exim_mainlog) will suggest you the exact reason for the error.
# mail -v email@example.com
<= firstname.lastname@example.org U=root P=local S=391
root@server8 [~]# delivering 1K2CMu-0004PY-F4
lowest numbered MX record points to local host: server.com
== email@example.com R=lookuphost defer (-1): lowest numbered MX record points to local host
The error “lowest numbered MX record points to local host: server.com” can be due to the following reason.
1) The file /etc/localdomains does not exists.
2) The information about the concerned domain is not available on the file /etc/localdomains while the exim attempts to dispatch mail.
3) Wrong MX record mentioned in the zone file.
To resolve the issue you can use the cPanel scripts:
If the issue still persists
Ensure that the concerned domain is properly designated as the /etc/localdomains to allow Exim to know that they suppose to receive the mail without querying DNS again. If the domain is not available in the said file, add it manually and restart the mail server.
The issue should be resolved now.
If you need any assistance, feel free to open a support ticket with us.
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