title: GIT send-mail failing to send mail
body: <p>I am trying send patch to linux-mailing list using git send-email but it is failing with following error</p>
  
  <pre><code>Unable to initialize SMTP properly. 
  Check config and use --smtp-debug. 
  
  VALUES: server=smtp.gmail.com 
          encryption=tls 
          maildomain=xyz.domain.name at /usr/libexec/git-core/git-send-email line 1040.
  </code></pre>
  
  <p>following are my smtp setting</p>
  
  <pre><code>[sendemail]
      smtpEncryption=tls
      smtpServer=smtp.gmail.com
      smtpUser=xyz@gmail.com
      smtpServerPort = 587
  </code></pre>
  
  <p>Am I missing anything? Please Help!! Thanks                          </p>