[exim] could not connect to server: ld:@

Hi All...

I am trying to make Exim4 connect to a postgres server. I put this in my
conf file:

hide pgsql_servers = prod01.mydomain.com/landrush/email_user/password-here

The database is on a different machine than the mail server, and other mail
servers can connect to it okay. When I do something that tries to connect
to the database server, I get this funny error message:

PGSQL connection failed: could not connect to server: ld:@

There is no indication that there was a connection attempt over on the
database machine, I think.

My question is, what is ld:@ referring to? Is this an indication that
Exim4 does not know what it should connect to? I searched for this all
over, but no joy. Does anyone know?

Thanks...

Jim