diff --git a/install/lib/installer_base.lib.php b/install/lib/installer_base.lib.php
index 413ef20ea7af585fcf56ee06562de5471f0a8d1f..60ad43bc624a17dc085600cd20d753563e9d654a 100644
--- a/install/lib/installer_base.lib.php
+++ b/install/lib/installer_base.lib.php
@@ -971,6 +971,7 @@ class installer_base {
 			} else {
 				copy('tpl/debian_dovecot2.conf.master', $config_dir.'/'.$configfile);
 			}
+			replaceLine($config_dir.'/'.$configfile, 'postmaster_address = postmaster@example.com', 'postmaster_address = postmaster@'.$conf['hostname'], 1, 0);
 		} else {
 			if(is_file($conf['ispconfig_install_dir'].'/server/conf-custom/install/debian_dovecot.conf.master')) {
 				copy($conf['ispconfig_install_dir'].'/server/conf-custom/install/debian_dovecot.conf.master', $config_dir.'/'.$configfile);
diff --git a/install/tpl/debian_dovecot2.conf.master b/install/tpl/debian_dovecot2.conf.master
index f359260dabc47496f301110c4e20022db46c9a96..2ffe8f224c5a5c4261e3d92eea736f709d4c371d 100644
--- a/install/tpl/debian_dovecot2.conf.master
+++ b/install/tpl/debian_dovecot2.conf.master
@@ -4,6 +4,7 @@ auth_mechanisms = plain login
 disable_plaintext_auth = no
 log_timestamp = "%Y-%m-%d %H:%M:%S "
 mail_privileged_group = vmail
+postmaster_address = postmaster@example.com
 ssl_cert = </etc/postfix/smtpd.cert
 ssl_key = </etc/postfix/smtpd.key
 passdb {