diff --git a/install/email-configs-one/main.cf b/install/email-configs-one/main.cf
index 3abf4a0d7..32fe71b45 100644
--- a/install/email-configs-one/main.cf
+++ b/install/email-configs-one/main.cf
@@ -56,11 +56,14 @@ smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, rej
 smtpd_use_tls = yes
 smtpd_tls_cert_file = /etc/pki/dovecot/certs/dovecot.pem
 smtpd_tls_key_file = /etc/pki/dovecot/private/dovecot.pem
-virtual_create_maildirsize = yes
-virtual_maildir_extended = yes
-proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps
+proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks
 virtual_transport = dovecot
 dovecot_destination_recipient_limit = 1
 inet_interfaces = all
 smtp_tls_security_level = may
-disable_vrfy_command = yes
\ No newline at end of file
+disable_vrfy_command = yes
+
+# MUA client restrictions
+mua_client_restrictions = permit_sasl_authenticated,reject
+mua_helo_restrictions = permit_mynetworks,permit_sasl_authenticated,reject
+mua_sender_restrictions = permit_sasl_authenticated,reject
\ No newline at end of file