diff --git a/mail-server/postfix.nix b/mail-server/postfix.nix
index 76f65a9..9c7568f 100644
--- a/mail-server/postfix.nix
+++ b/mail-server/postfix.nix
@@ -207,13 +207,16 @@ in
       mapFiles."denied_recipients" = denied_recipients_file;
       mapFiles."reject_senders" = reject_senders_file;
       mapFiles."reject_recipients" = reject_recipients_file;
-      sslCert = certificatePath;
-      sslKey = keyPath;
       enableSubmission = cfg.enableSubmission;
       enableSubmissions = cfg.enableSubmissionSsl;
       virtual = lookupTableToString (mergeLookupTables [all_valiases_postfix catchAllPostfix forwards]);
 
       config = {
+        smtpd_tls_chain_files = [
+          "${keyPath}"
+          "${certificatePath}"
+        ];
+
         # Extra Config
         mydestination = "";
         recipient_delimiter = cfg.recipientDelimiter;