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Is the Length of an Email Address Limited? If Yes, What is the Maximum?

Yes, the maximum length of an email address is 320 characters.

Every email address is composed of two parts. The local part comes before the '@' sign, and the domain part follows it. In "user@example.com", the local part is "user", and the domain part is "example.com".


  • local part must not exceed 64 characters and
  • the domain part cannot be longer than 255 characters.
In sum, an email address can be 320 characters long at most. When you create an address, make sure your user name has less than 65 characters.

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