diff --git a/3rd_smtpclient/mimemessage.cpp b/3rd_smtpclient/mimemessage.cpp
index f419936b..fdc687c0 100644
--- a/3rd_smtpclient/mimemessage.cpp
+++ b/3rd_smtpclient/mimemessage.cpp
@@ -5,7 +5,10 @@
 #include <typeinfo>
 
 MimeMessage::MimeMessage(bool createAutoMimeContent) :
-    hEncoding(MimePart::_8Bit)
+    sender(nullptr)
+    , content(nullptr)
+    , hEncoding(MimePart::_8Bit)
+
 {
     if (createAutoMimeContent) {
         this->content = new MimeMultiPart();
@@ -14,6 +17,26 @@ MimeMessage::MimeMessage(bool createAutoMimeContent) :
 
 MimeMessage::~MimeMessage()
 {
+    //释放内存
+    if (sender) {
+        delete sender;
+        sender = nullptr;
+    }
+
+    if (content) {
+        delete content;
+        content = nullptr;
+    }
+
+    qDeleteAll(recipientsTo);
+    recipientsTo.clear();
+
+    qDeleteAll(recipientsCc);
+    recipientsCc.clear();
+
+    qDeleteAll(recipientsBcc);
+    recipientsBcc.clear();
+
 }
 
 MimePart &MimeMessage::getContent()
diff --git a/3rd_smtpclient/mimemultipart.cpp b/3rd_smtpclient/mimemultipart.cpp
index dfde103a..a1895ccd 100644
--- a/3rd_smtpclient/mimemultipart.cpp
+++ b/3rd_smtpclient/mimemultipart.cpp
@@ -26,7 +26,9 @@ MimeMultiPart::MimeMultiPart(MultiPartType type)
 
 MimeMultiPart::~MimeMultiPart()
 {
-
+    //释放内存
+    qDeleteAll(parts);
+    parts.clear();
 }
 
 void MimeMultiPart::addPart(MimePart *part)
diff --git a/emailtool/sendemailthread.cpp b/emailtool/sendemailthread.cpp
index e8a1993a..1beefce3 100644
--- a/emailtool/sendemailthread.cpp
+++ b/emailtool/sendemailthread.cpp
@@ -72,10 +72,10 @@ void SendEmailThread::run()
             //构建邮件标题
             message.setSubject(emialTitle);
 
-            //构建邮件正文
-            MimeHtml text;
-            text.setHtml(content);
-            message.addPart(&text);
+            //构建邮件正文(传递指针，并且统一将内存控制权交给MimeMessage
+            MimeHtml *ptext = new MimeHtml;
+            ptext->setHtml(content);
+            message.addPart(ptext);
 
             //构建附件-报警图像
             if (fileName.length() > 0) {