Working with `redux-form` & `react-intl` and I am wondering what might you display to the user that the _message body_ is invalid. The code below is what I am displaying now, but it seems overkill and possibly bad to just come right out and say this is the regex I'm using (as my first line of defense) to protect my backend from getting some malicious garbage. Thoughts? Ideas?

// validate.js
import { messages } from '../../lib'

const messageRegex = /^[A-Za-z0-9.!?,;\s]+$/

export default (values, { intl }) => {
  const errors = {}

  if (!values.message) {
    errors.message = intl.formatMessage(messages.errMessageReq)
  } else if (values.message.length < 10) {
    errors.message = intl.formatMessage(messages.errMessageMinLen)
  } else if (values.message.length > 140) {
    errors.message = intl.formatMessage(messages.errMessageMaxLen)
  } else if (!messageRegex.test(values.message)) {
    errors.message = intl.formatMessage(messages.errMessageVal)
  }

  return errors
}

// ./lib/messages.js

import { defineMessages } from 'react-intl'

const messages = defineMessages({
 ...
 errMessageReq: {
 id: 'messageRequired',
 defaultMessage: 'Message is required.'
  },
 errMessageVal: {
 id: 'messageInvalid',
 defaultMessage:
 'Invalid message. May only contain: A-Z, a-z, 0-9, ".", "!", "?", & ","'
  },
 errMessageMaxLen: {
 id: 'messageMaxLength',
 defaultMessage: 'Message must be not longer than 140 characters.'
  },
 errMessageMinLen: {
 id: 'messageMinLength',
 defaultMessage: 'Message must be at least 10 characters long.'
})

export { messages }