I have been getting quite a bit of emails in my mail queue. I found this modification for exims config file. I was not sure if it was an ok thing to use or not. Any suggestions.

accept domains = +local_domains
message = unknown user
verify = recipient
accept domains = +relay_domains
accept hosts = +relay_hosts
accept condition = ${perl{checkrelayhost}{$sender_host_address}}
The parts in bold are what was suggested to be added under the accept domains section. Any help would be great.