diff --git a/roles/koji_hub/templates/koji-gc.conf.j2 b/roles/koji_hub/templates/koji-gc.conf.j2
index d1dc23cc33..f0e976c813 100644
--- a/roles/koji_hub/templates/koji-gc.conf.j2
+++ b/roles/koji_hub/templates/koji-gc.conf.j2
@@ -8,6 +8,7 @@ principal=koji-gc/koji{{env_suffix}}.fedoraproject.org@{{ipa_realm}}
 ; The location of the keytab for the principal above
 keytab=/etc/krb5.koji-gc_koji{{env_suffix}}.fedoraproject.org.keytab
 krb_rdns = False
+smtp_host = bastion.phx2.fedoraproject.org
 
 key_aliases =
     30C9ECF8    fedora-test