What is the maximum length of a valid email address?

Question

What is the maximum length of a valid email address? Is it defined by any standard?

Answer 1

320

And the segments look like this

{64}@{255}

64 + 1 + 255 = 320

You should also read this if you are validating emails

http://haacked.com/archive/2007/08/21/i-knew-how-to-validate-an-email-address-until-i.aspx