title: Oracle PL/SQL UTL_SMTP raising a 501 5.1.7 Bad sender address syntax
body: <p>When I send e-mails using the package UTL_SMTP I am getting this error when executing the comand UTL_SMTP.MAIL:</p>
  
  <pre><code>501 5.1.7 Bad sender address syntax
  </code></pre>
  
  <p>I am passing olny the e-mail as second parameter. This occurs only with certain smtp servers.
  The code is this:</p>
  
  <pre><code>sFrom := 'myemail@myserver.com';
  Utl_Smtp.Mail(Connection, sFrom);
  </code></pre>
  
  <p>Does anyone know how to fix this?</p>
  
  <p>Thanks in advance.</p>