From bcd52d08ab0af295e8cfab590e300ce8c74843f3 Mon Sep 17 00:00:00 2001
From: Leandro Facchinetti <github@leafac.com>
Date: Mon, 30 Mar 2020 21:15:42 -0400
Subject: [PATCH] @types/smtp-server Make optional the callback to close()
 (#43268)

Note how the implementation [checks](https://github.com/nodemailer/smtp-server/blob/427cb7a2382a74f79fea379fb23bf781625ea112/lib/smtp-server.js#L138) whether the callback was passed.
---
 types/smtp-server/index.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/types/smtp-server/index.d.ts b/types/smtp-server/index.d.ts
index 4d670c100b..41306dc9f6 100644
--- a/types/smtp-server/index.d.ts
+++ b/types/smtp-server/index.d.ts
@@ -306,7 +306,7 @@ export class SMTPServer extends EventEmitter {
     listen(handle: any, listeningListener?: () => void): net.Server; // tslint:disable-line unified-signatures
 
     /** Closes the server */
-    close(callback: () => void): void;
+    close(callback?: () => void): void;
 
     updateSecureContext(options: tls.TlsOptions): void;