email_util: 修改邮件发送方式

Signed-off-by: Binren Zhnag <zhangbr@elab-plus.com>

email_util.py

@@ -1,7 +1,7 @@
 # coding=utf-8
 from email.mime.text import MIMEText
 from email.header import Header
-from smtplib import SMTP
+from smtplib import SMTP, SMTP_SSL
 from email.mime.multipart import MIMEMultipart
 from email.mime.base import MIMEBase
 from email.encoders import encode_base64
@@ -27,7 +27,7 @@ class EmailUtil(object):
                   ):
         global smtp
         try:
-            smtp = SMTP(self.host_server)
+            smtp = SMTP_SSL(self.host_server, 465)
             smtp.set_debuglevel(1)
             smtp.ehlo(self.host_server)
             smtp.login(self.sender_email, self.pwd)