lib/storage.js
function(callback) {
    var params = {
      Bucket: S3Handler.options.S3BucketName, 
      Key: S3Handler.options.mboxName + S3Handler.options.S3MboxKeySuffix, 
      Body: JSON.stringify(data)
    };
    
    s3.upload(params, function(err, response) {
      if (err) {
        if (CONSOLE_MESSAGES) console.log(new Date().toISOString(),'Error saving Mbox:',err);
      }
      callback(err, response);
    });
  }
function(callback) {
    var params = {
      Bucket: S3Handler.options.S3BucketName, 
      Key: S3Handler.options.mboxName + S3Handler.options.S3MboxKeySuffix, 
      Body: JSON.stringify(data)
    };
    
    s3.upload(params, function(err, response) {
      if (err) {
        if (CONSOLE_MESSAGES) console.log(new Date().toISOString(),'Error saving Mbox:',err);
      }
      callback(err, response);
    });
  }
function ( callback ) { var params = { Bucket : S3Handler . options . S3BucketName , Key : S3Handler . options . mboxName + S3Handler . options . S3MboxKeySuffix , Body : JSON . stringify ( data ) } ; s3 . upload ( params , function ( err , response ) { if ( err ) { if ( CONSOLE_MESSAGES ) console . log ( new Date ( ) . toISOString ( ) , 'Error saving Mbox:' , err ) ; } callback ( err , response ) ; } ) ; }
listObjects 
Saves the data file to the user mailbox
listObjects Saves the data file to the user mailbox