diff --git a/install/tpl/debian_postfix.conf.master b/install/tpl/debian_postfix.conf.master
index dcd5f592d880e0cfb8972863e89d5172eb14cf18..a6a48e0e02332626db23d6a9df83b92bb82722c9 100644
--- a/install/tpl/debian_postfix.conf.master
+++ b/install/tpl/debian_postfix.conf.master
@@ -28,6 +28,7 @@ proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virt
 smtpd_helo_required = yes
 smtpd_helo_restrictions = reject_invalid_helo_hostname, permit_mynetworks, check_helo_access regexp:{config_dir}/helo_access, permit_sasl_authenticated, reject_non_fqdn_helo_hostname, check_helo_access regexp:{config_dir}/blacklist_helo, {reject_unknown_helo_hostname}, permit
 smtpd_sender_restrictions =  {reject_aslm} check_sender_access regexp:{config_dir}/tag_as_originating.re, permit_mynetworks{reject_slm}, permit_sasl_authenticated, reject_non_fqdn_sender, check_sender_access regexp:{config_dir}/tag_as_foreign.re, check_sender_access proxy:mysql:{config_dir}/mysql-virtual_sender.cf
+smtpd_reject_unlisted_sender = yes
 smtpd_client_restrictions = check_client_access proxy:mysql:{config_dir}/mysql-virtual_client.cf, permit_inet_interfaces, permit_mynetworks, permit_sasl_authenticated{rbl_list}, reject_unauth_pipelining {reject_unknown_client_hostname}, permit
 smtpd_etrn_restrictions = permit_mynetworks, reject
 smtpd_data_restrictions = permit_mynetworks, reject_unauth_pipelining, reject_multi_recipient_bounce, permit
diff --git a/install/tpl/fedora_postfix.conf.master b/install/tpl/fedora_postfix.conf.master
index 45bc0c117e0192ad93284f928b3303b56119316d..3cd8357a66b96917ea251064918ab99f62f0d63e 100644
--- a/install/tpl/fedora_postfix.conf.master
+++ b/install/tpl/fedora_postfix.conf.master
@@ -24,6 +24,7 @@ proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virt
 smtpd_helo_required = yes
 smtpd_helo_restrictions = reject_invalid_helo_hostname, permit_mynetworks, check_helo_access regexp:{config_dir}/helo_access, permit_sasl_authenticated, reject_non_fqdn_helo_hostname, check_helo_access regexp:{config_dir}/blacklist_helo, {reject_unknown_helo_hostname}, permit
 smtpd_sender_restrictions =  {reject_aslm} check_sender_access regexp:{config_dir}/tag_as_originating.re, permit_mynetworks{reject_slm}, permit_sasl_authenticated, reject_non_fqdn_sender, check_sender_access regexp:{config_dir}/tag_as_foreign.re, check_sender_access proxy:mysql:{config_dir}/mysql-virtual_sender.cf
+smtpd_reject_unlisted_sender = yes
 smtpd_client_restrictions = check_client_access proxy:mysql:{config_dir}/mysql-virtual_client.cf, permit_inet_interfaces, permit_mynetworks, permit_sasl_authenticated{rbl_list}, reject_unauth_pipelining {reject_unknown_client_hostname}, permit
 smtpd_etrn_restrictions = permit_mynetworks, reject
 smtpd_data_restrictions = permit_mynetworks, reject_unauth_pipelining, reject_multi_recipient_bounce, permit
diff --git a/install/tpl/gentoo_postfix.conf.master b/install/tpl/gentoo_postfix.conf.master
index b3ff8f68041c19f7c1fd70b4464ec5414fc6a0fd..f4a1d4025c6e870dedcc031a7265a3f5f7fe65ff 100644
--- a/install/tpl/gentoo_postfix.conf.master
+++ b/install/tpl/gentoo_postfix.conf.master
@@ -23,6 +23,7 @@ proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virt
 smtpd_helo_required = yes
 smtpd_helo_restrictions = reject_invalid_helo_hostname, permit_mynetworks, check_helo_access regexp:{config_dir}/helo_access, permit_sasl_authenticated, reject_non_fqdn_helo_hostname, check_helo_access regexp:{config_dir}/blacklist_helo, {reject_unknown_helo_hostname}, permit
 smtpd_sender_restrictions =  {reject_aslm} check_sender_access regexp:{config_dir}/tag_as_originating.re, permit_mynetworks{reject_slm}, permit_sasl_authenticated, reject_non_fqdn_sender, check_sender_access regexp:{config_dir}/tag_as_foreign.re, check_sender_access proxy:mysql:{config_dir}/mysql-virtual_sender.cf
+smtpd_reject_unlisted_sender = yes
 smtpd_client_restrictions = check_client_access proxy:mysql:{config_dir}/mysql-virtual_client.cf, permit_inet_interfaces, permit_mynetworks, permit_sasl_authenticated{rbl_list}, reject_unauth_pipelining {reject_unknown_client_hostname}, permit
 smtpd_etrn_restrictions = permit_mynetworks, reject
 smtpd_data_restrictions = permit_mynetworks, reject_unauth_pipelining, reject_multi_recipient_bounce, permit
diff --git a/install/tpl/opensuse_postfix.conf.master b/install/tpl/opensuse_postfix.conf.master
index 7386fad16eb1fb40634797564be9e520b016e380..7d3669853a6ab2ec03fa7ed5264bde0d13a2d509 100644
--- a/install/tpl/opensuse_postfix.conf.master
+++ b/install/tpl/opensuse_postfix.conf.master
@@ -26,6 +26,7 @@ proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virt
 smtpd_helo_required = yes
 smtpd_helo_restrictions = reject_invalid_helo_hostname, permit_mynetworks, check_helo_access regexp:{config_dir}/helo_access, permit_sasl_authenticated, reject_non_fqdn_helo_hostname, check_helo_access regexp:{config_dir}/blacklist_helo, {reject_unknown_helo_hostname}, permit
 smtpd_sender_restrictions =  {reject_aslm} check_sender_access regexp:{config_dir}/tag_as_originating.re, permit_mynetworks{reject_slm}, permit_sasl_authenticated, reject_non_fqdn_sender, check_sender_access regexp:{config_dir}/tag_as_foreign.re, check_sender_access proxy:mysql:{config_dir}/mysql-virtual_sender.cf
+smtpd_reject_unlisted_sender = yes
 smtpd_client_restrictions = check_client_access proxy:mysql:{config_dir}/mysql-virtual_client.cf, permit_inet_interfaces, permit_mynetworks, permit_sasl_authenticated{rbl_list}, reject_unauth_pipelining {reject_unknown_client_hostname}, permit
 smtpd_etrn_restrictions = permit_mynetworks, reject
 smtpd_data_restrictions = permit_mynetworks, reject_unauth_pipelining, reject_multi_recipient_bounce, permit