diff --git a/roles/mail_server/templates/main.cf.j2 b/roles/mail_server/templates/main.cf.j2
index ad273cd8dd2de92d92cce6ce81a19bf093391f71..b3ab8923ce9e29cd6743e52ae5d5a328290233ca 100644
--- a/roles/mail_server/templates/main.cf.j2
+++ b/roles/mail_server/templates/main.cf.j2
@@ -54,6 +54,8 @@ smtpd_tls_security_level = may
 smtpd_tls_auth_only = yes
 smtpd_tls_cert_file = /etc/ssl/certs/{{ ansible_fqdn }}_smtp.pem
 smtpd_tls_key_file = /etc/ssl/private/{{ ansible_fqdn }}_smtp.key
+smtpd_tls_dh1024_param_file = /etc/ssl/private/{{ inventory_hostname }}_smtp.dh.pem
+smtpd_tls_dh512_param_file = /etc/ssl/private/{{ inventory_hostname }}_smtp.dh.pem
 smtpd_use_tls=yes
 smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
 smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache