我正在一个网站上工作，在启用 SMTP 服务器电子邮件的身份验证后停止工作。我安装了 SMTP pro 扩展并在运行自检时显示我
ASchroder.com SMTP Pro Self-test results
Testing outbound connectivity to Server:
Using SMTP configuration options
Connection to Host SMTP server successful.
Sending test email to your contact form address donotreply@example.com
Unable to send test email. Exception message was: Sender address is not valid for your login. Check your email program settings. ...
Please check and double check your username and password.
Contact Form test email used SMTPPro to send correctly.
Testing failed,
但是此电子邮件地址适用于联系我们表格和有效的电子邮件地址。电子邮件适用于联系我们表格，但不适用于忘记密码等。指导我，以便我解决问题。谢谢