[Exim] Authorization

I had SNMP Login authorization working perfectly for weeks, now all the
sudden it doesn't work at all. Here is the section of my exim.conf

login:
driver = plaintext
public_name = LOGIN
server_prompts = "Username:: : Password::"
server_condition = "${if
crypteq{$2}{${extract{1}{:}{${lookup{$1}lsearch{/var/mail/config/auth.users}{$value}{*:*}}}}}{1}{0}}"
server_set_id = $1

Like I said, it worked PERFECTLY then stopped. I have been hand copying the
users from /etc/shadow for the people I want to give access to. I didn't
touch ANY of the config settings, and now it is no longer working. I
checked through the mainlogs and it just shows "refuse relay" for all
hosts. I also have host_auth_accept_relay =*

I checked and double checked all the settings, and I'm quite baffled. Where
should I start looking?