custom (better) email validation

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custom (better) email validation

  • motivation:
    • paid service to determine that
    • we have the knowledge to do that so why not (for free) ?
    • if not complete, at least we'll learn something
  • few questions
    • is email valid ?
    • is domain valid ?
    • does domain has mx record
    • is email reachabl aka email delivery state ?
    • is email disposable ?