diff --git a/mail-server/postfix.nix b/mail-server/postfix.nix
index c050736..351da81 100644
--- a/mail-server/postfix.nix
+++ b/mail-server/postfix.nix
@@ -274,9 +274,6 @@ in
         # Submission by mail clients is handled in submissionOptions
         smtpd_tls_security_level = "may";
 
-        # strong might suffice and is computationally less expensive
-        smtpd_tls_eecdh_grade = "ultra";
-
         # Disable obselete protocols
         smtpd_tls_protocols = "TLSv1.3, TLSv1.2, TLSv1.1, !TLSv1, !SSLv2, !SSLv3";
         smtp_tls_protocols = "TLSv1.3, TLSv1.2, TLSv1.1, !TLSv1, !SSLv2, !SSLv3";