SMTP Relay Server
The Issue
We use a third party server for our email filtering service before it hits our newly installed WHM/cPanel servers. We have noticed that when using it, any sender receives the following NDR:
This is a delivery failure notification message indicating that an email you addressed to email address :
-- user@domain.com
could not be delivered. The problem appears to be :
-- Recipient email address is possibly incorrect
Additional information follows :
-- user@domain.com prohibited. We do not relay
This condition occurred after 0 attempt(s) to deliver over a period of 0 hour(s).
If you sent the email to multiple recipients, you will receive one of these messages for each one which failed delivery, otherwise they have been sent.
Setup/Issue Summary domain.com has an MX record pointing to relayserver.serverhost.com The relay server then filters and forwards the email on to our WHM server WHM server replies back denying the relay Attempted Resolutions - I added the IP range (e.g 192.168.1.0/24) to the /etc/alwaysrelay file and rebooted exim, no luck - I added the IP range (e.g 192.168.1.0/24) to the exim ACL for the following: "Sender verification bypass IP addresses", "Only-verify-recipient", "Trusted SMTP IP addresses" - I added the IP range (e.g 192.168.1.0/24) to the CSF whitelist I am lost as to how to fix this issue and the only posts found are out of date, any advice would be appreciated.
Setup/Issue Summary domain.com has an MX record pointing to relayserver.serverhost.com The relay server then filters and forwards the email on to our WHM server WHM server replies back denying the relay Attempted Resolutions - I added the IP range (e.g 192.168.1.0/24) to the /etc/alwaysrelay file and rebooted exim, no luck - I added the IP range (e.g 192.168.1.0/24) to the exim ACL for the following: "Sender verification bypass IP addresses", "Only-verify-recipient", "Trusted SMTP IP addresses" - I added the IP range (e.g 192.168.1.0/24) to the CSF whitelist I am lost as to how to fix this issue and the only posts found are out of date, any advice would be appreciated.
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Hello :) What entry do you see in /var/log/exim_mainlog when this happens? Also, is the domain name stored in the /etc/localdomains file? Thank you. 0 -
Hello :) What entry do you see in /var/log/exim_mainlog when this happens? Also, is the domain name stored in the /etc/localdomains file? Thank you.
When sending an email, nothing is noted within the /var/log/exim_mainlog The domain is stored in the /etc/localdomains0 -
When sending an email, nothing is noted within the /var/log/exim_mainlog
Try searching for the domain name in this log file. EX:exigrep user@domain /var/log/exim_mainlog
Thank you.0
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