diff --git a/roles/mail_forwarder/templates/main.cf.j2 b/roles/mail_forwarder/templates/main.cf.j2
index 3d8464d1455b98479df6ef75aee3f7708c8f61e5..35f1f0a704341ed634f26121c5bb78c1aa626a96 100644
--- a/roles/mail_forwarder/templates/main.cf.j2
+++ b/roles/mail_forwarder/templates/main.cf.j2
@@ -20,6 +20,8 @@ readme_directory = no
 # TLS parameters
 smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
 smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.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