diff --git a/confd/templates/20-lmtp.conf.tmpl b/confd/templates/20-lmtp.conf.tmpl
index 529db27..0129829 100644
--- a/confd/templates/20-lmtp.conf.tmpl
+++ b/confd/templates/20-lmtp.conf.tmpl
@@ -1,5 +1,5 @@
 protocol lmtp {
   # postmaster_address aparentemente es obligatorio
-  postmaster_address = postmaster@{{ index (split (getv "/mail/domains") " ") 0 }}
+  postmaster_address = postmaster@{{ index (split (index (split (getv "/mail/domains") " ") 0) ",") 0 }}
   mail_plugins = $mail_plugins sieve
 }