title: How to retrieve fixed upper limit on message size SMTP server
body: <p>I need to know the fixed upper limit on message size SMTP server.
  For instance, for GMAIL we have 25MB as limit for sending mail.</p>
  
  <p>Can any one please help me with command that I can use.
  I referred to RFC 1870 for the same.</p>
  
  <p>Thanks and Regards,
  NehaC</p>