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JavaScript

// Lets imagine this object is your req.param
reqParam = {
  m1: 'email1',
  m2: '',
  m3: 'email3',
  m4: 'email4',
  someOther1: 'some other param',
  m5: '',
  m61: 'email6',
  someOther: 'otherValue'
}

const  emailTable = []
for (let key of Object.keys(reqParam)){
	// check if it is email and if it has value
  if(key.match(/^[m]+[0-9]*$/g) != null && reqParam[key] != ''){
  	emailTable.push(reqParam[key])
  } 
}
console.log(emailTable)

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