hostlist relay_hosts = net-lsearch;/etc/virtual/pophosts : 127.0.0.1
Hello,
Do you mean 127.0.0.1? If so, you should remove 127.0.0.1 from line:
and re-start Exim.
What do you mean? By default exim allow connections on 25 port without authentication from 127.0.0.1. If you do telnet on local console to 127.0.0.1, that is your case and solution is already named.