[Solved] NJABL Blocking Directadmin Email with Exim
Woke up this morning to directadmin blocking new email from Office 365 exchange.
The following error was being reported to the sender via Non Delivery Report (NDR):
550 5.0.350 Remote server returned an error -> 550 Email blocked by NJABL – to unblock see http://www.example.com/
In this instance we found a default setting within exim.conf that ships with directadmin to be responsible for this. There was a section to deny based on the presence of an entry in the NJABL blocklist – which has been defunct since 2013. While this effected Office 365 users, it didn’t seem to bother gmail at all.
To resolve this issue you’ll need to edit your /etc/exim.conf file.
Look for the following entry:
deny using njabl
deny message = Email blocked by NJABL – to unblock see http://www.example.com/
hosts = !+relay_hosts
domains = +use_rbl_domains
!authenticated = *
dnslists = dnsbl.njabl.org
Simply comment out these lines with a “#” symbol, restart your exim service with the command “services restart exim” and the problem should be resolved. Let me know otherwise and I’ll troubleshoot with you.