From 9412f318745f79fd4a42e84030f964d4c54f31e0 Mon Sep 17 00:00:00 2001
From: Winni Neessen <wn@neessen.net>
Date: Mon, 11 Nov 2024 17:47:59 +0100
Subject: [PATCH] Lock mutex when setting the logger

Add mutex locking to ensure thread-safety when setting the logger in the `smtp` package. This prevents potential race conditions and ensures that the logger is updated consistently in concurrent operations.
---
 smtp/smtp.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/smtp/smtp.go b/smtp/smtp.go
index 4841ec8..ed86ac9 100644
--- a/smtp/smtp.go
+++ b/smtp/smtp.go
@@ -587,7 +587,9 @@ func (c *Client) SetLogger(l log.Logger) {
 	if l == nil {
 		return
 	}
+	c.mutex.Lock()
 	c.logger = l
+	c.mutex.Unlock()
 }
 
 // SetLogAuthData enables logging of authentication data in the Client.