AWS服务器SMTP电子邮件连接超时n Swiftmailer

Question

最近在AWS上移动了PHP项目。 我使用Swift-mailer使用SMTP发送电子邮件。

我遇到了Sometime错误，有时候电子邮件正在运行。 错误是

  

＆＃34;致命错误：未捕获Swift_TransportException：连接到   smtp.example.com:587超时＆＃34;

代码：

$transport = (new Swift_SmtpTransport('smtp.example.com', 587))
  ->setUsername('info@example.com')
  ->setPassword('********');

我搜索了很多，但我无法得到确切的解决方案，也没有提示。 所以请帮忙。

我现在使用PHPmailer.There显示有时会发送电子邮件，有时会出现以下错误。 显示错误：

SMTP -> get_lines(): $str is "235 Authentication succeeded "
SMTP -> get_lines(): $data is "235 Authentication succeeded "
SMTP -> get_lines(): $data was ""
SMTP -> get_lines(): $str is "250 OK "
SMTP -> get_lines(): $data is "250 OK "
SMTP -> FROM SERVER:250 OK
SMTP -> get_lines(): $data was ""
SMTP -> get_lines(): $str is "250 Accepted "
SMTP -> get_lines(): $data is "250 Accepted "
SMTP -> FROM SERVER:250 Accepted
SMTP -> get_lines(): $data was ""
SMTP -> get_lines(): $str is "354 Enter message, ending with "." on a line by itself "
SMTP -> get_lines(): $data is "354 Enter message, ending with "." on a line by itself "
SMTP -> FROM SERVER:354 Enter message, ending with "." on a line by itself
SMTP -> FROM SERVER:
SMTP -> ERROR: DATA not accepted from server:

谢谢。