RSET connection every time before re-using in the pool.

Ref: knadh/listmonk#1629 knadh/listmonk#1530 knadh/listmonk#1192 knadh/listmonk#300
knadh · Dec 23, 2023 · 6f93552 · 6f93552
1 parent 3c7a8e7
commit 6f93552
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/pool.go b/pool.go
@@ -262,6 +262,12 @@ func (p *Pool) returnConn(c *conn, lastErr error) (err error) {
 		}
 	}
 
+	// Always RSET (SMTP) the connection bfeore reusing it as some servers
+	// throw "sender already specified", or "commands out of sequence" errors.
+	if err := c.conn.Reset(); err != nil {
+		return err
+	}
+
 	select {
 	case p.conns <- c:
 		return nil