diff --git a/sendmail/templates/sendmail.mc.erb b/sendmail/templates/sendmail.mc.erb
index 2cfb0d9..18c8cc7 100644
--- a/sendmail/templates/sendmail.mc.erb
+++ b/sendmail/templates/sendmail.mc.erb
@@ -87,7 +87,11 @@ FEATURE(masquerade_entire_domain)dnl
 FEATURE(`accept_unresolvable_domains')dnl
 dnl #
 define(`confMATCH_GECOS')dnl
+<% if @mail_smart_host -%>
+define(`confDOMAIN_NAME', `<%= @homename %>')dnl
+<% else -%>
 define(`confDOMAIN_NAME', `<%= @mail_domain %>')dnl
+<% end -%>
 define(`confDONT_BLAME_SENDMAIL', `GroupWritableDirpathSafe,GroupWritableIncludeFileSafe,GroupWritableForwardFile,ForwardFileInGroupWritableDirPath')dnl
 dnl #
 <% if @sendmail_milter -%>