diff --git a/roles/mail_forwarder/defaults/main.yml b/roles/mail_forwarder/defaults/main.yml
index e7dcda4ed297d54c66f03a91194cc5814bfdbc15..9c75026da95130464a22ecd45debea346b2ad525 100644
--- a/roles/mail_forwarder/defaults/main.yml
+++ b/roles/mail_forwarder/defaults/main.yml
@@ -5,3 +5,4 @@ smtp_from_relay_allowed: true
 smtp_relay_host: ""
 smtp_relay_truststore: "{{ lookup('file', tls_certificate_dir + '/truststore.pem') }}"
 smtp_relay_host_port: null
+mail_message_size_limit: 10240000