title: Error Expected response code 250 but got code "550", with message "550 This is a submission only port. You must authenticate before sending mail
body: <p>I have the centos server with laravel setup. I am facing issue while sending email from server. My laravel version is 5.8.29 and PHP version is 7.3.6. I am using SMTP to send email. Guys please do help me out. Here are my code. </p>
  
  <p>It's very strange to say that from my local setup from my system I am able to send email with same SMTP details with current project setup with same code. But some how on production server the emails are not sending. I have cross checked with swift mailer and tested with separate file for only email send  and its work. But from actual environment is not work. </p>
  
  <p>.env file </p>
  
  <pre><code>MAIL_DRIVER=smtp
  MAIL_HOST=mail.domain.com
  MAIL_PORT=587
  mail_username=username
  MAIL_PASSWORD=password
  MAIL_ENCRYPTION=tls
  </code></pre>
  
  <p>Email should be send from the environment file</p>