我正在使用magento开发电子商务网站，我使用SMTP Pro与谷歌应用程序或电子邮件发送电子邮件。它工作得非常好，但几个月后，当我尝试使用自检时，我收到了这个错误
SMTP Pro Self Test Results
Sending test email to your contact form address: hello@example.com from: pavithra@test.lk. Unable to send test email.
Exception message was: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
Please check the user guide for frequent error messages and their solutions.
Default templates exist.
Email communications are enabled.
Testing failed, please review the reported problems and if you need further help visit the support page or contact me via support@aschroder.com for support.
这是什么错误以及如何修复它。为电子邮件提供的用户名和密码是正确的
答案 0 :(得分：0)
显示错误消息，例如“已建立的连接失败，因为已连接的主机无法响应”表示重新确认用户名和密码或与第三方联系并向他显示此消息。