Email Standards

  • What is the maximum permissible length for an email address, and for each of its components? What are the valid characters, besides A - Z, 0 - 9, and '@'?

  • local-part

    The maximum total length of a user name or other local-part is 64

    characters.

    domain

    The maximum total length of a domain name or number is 255

    characters.

    Mathew

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