EmailField: Maximum RFC-compliant length should be 320 characters

[a.lloyd.flanagan@…]

The documentation for model.EmailField states

Incompliance to RFCs

The default 75 character max_length is not capable of storing all possible RFC3696/5321-compliant
email addresses. In order to store all possible valid email addresses, a max_length of 254 is
required.

In fact, however, RFC3696 states of email address maximum length:

That limit is a maximum of 64 characters (octets)
in the "local part" (before the "@") and a maximum of 255 characters
(octets) in the domain part (after the "@") for a total length of 320
characters.

I note the same statement regarding the 254-character limit in the Release Notes document for version 1.8.

[Tim Graham]

Yes, it was initially 320, but subsequently revised. Please see ​this errata.

[a.lloyd.flanagan@…]

Whoops, my mistake for not checking the errata closely. Thanks for the info.