How do I ask for an email address in an HTML form?

Use a visible label connected to the input with matching for and id values. type="email" gives the browser useful email-field behaviour, and required asks it to reject an empty value on a normal form submission. A placeholder is extra help, not a replacement for the label. Always validate submitted values on the server too; browser checks can be bypassed.

<label for="email">Email address</label>
<input id="email" name="email"
  type="email" required
  placeholder="you@example.com">

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