Remote host address is the local host is an Exim error message which indicates that the sender or recipient's domain has your machine's hostname/IP, but Exim is not configured to accept mail for that domain.
Exim has a standard domainlist named +local_domains that pretty much every different Exim configuration system uses. See what domains are configured for your system by running:
exim -bP '+local_domains'
You will probably see a command that looks up a list of domains from a file. Put your hostname in that file and Exim should begin to work properly.
Article ID: 295, Created: 4/29/2025 at 1:19 PM, Modified: 4/29/2025 at 1:19 PM