exim4: Let exim know its external hostname.

This allows relaying to other domains (e.g., work as a backup MX) to
work, since exim knows defer mails instead of sending them to itself
again.

diff --git a/etc/exim4/conf.d/main/main_config b/etc/exim4/conf.d/main/main_config
index b4dcb3af2296abd29eb5bbe09a487750f57611bc..60a850081b4120b25bf8effa9c61f0bb021dfa4c 100644 (file)
--- a/etc/exim4/conf.d/main/main_config
+++ b/etc/exim4/conf.d/main/main_config
@@ -27,6 +27,9 @@ hostlist relay_from_hosts = *.drsnuggles.stderr.nl : drsnuggles.stderr.nl
 # can come from any vserver, just use our main hostname.
 qualify_domain = drsnuggles.stderr.nl
 
+# Let exim know how the rest of the world will try to reach us.
+hosts_treat_as_local = drsnuggles.stderr.nl
+
 # The gecos field in /etc/passwd holds not only the name. see passwd(5).
 gecos_pattern = ^([^,:]*)
 gecos_name = $1