exim config improvements

install/0.9.7/rhel/exim.conf

@@ -8,7 +8,7 @@ domainlist local_domains = dsearch;/etc/exim/domains/
 domainlist relay_to_domains = dsearch;/etc/exim/domains/
 hostlist   relay_from_hosts = 127.0.0.1
 hostlist   spammers = net-iplsearch;/etc/exim/spam-blocks.conf
-
+untrusted_set_sender = *
 acl_smtp_connect = acl_check_spammers
 acl_smtp_mail = acl_check_mail
 acl_smtp_rcpt = acl_check_rcpt
@@ -96,9 +96,6 @@ acl_check_rcpt:
   accept  hosts         = +relay_from_hosts
           control       = submission
 
-  accept  local_parts   = postmaster
-          domains       = +local_domains
-
   accept  authenticated = *
           control       = submission/domain=