diff --git a/postgrey.spec b/postgrey.spec
index 9b08a59..12d5cde 100644
--- a/postgrey.spec
+++ b/postgrey.spec
@@ -30,7 +30,7 @@ Requires:          perl(:MODULE_COMPAT_%(eval "`%{__perl} -V:version`"; echo $ve
 #Requires:          perl(Sys::Hostname)
 #Requires:          perl(Sys::Syslog)
 # Requiring postfix for its directories and GID.
-Recommends:        postfix
+Requires:           postfix
 Requires(pre):     shadow-utils
 Requires(post):    systemd
 Requires(preun):   systemd