EmailStr is not case-sensitive on local part of email per RFC 5321

[henriklindgren]

Bug

EmailStr validate-method performs lower() on whole string including local part, violating RFC 5321 by not conforming to

The local-part of a mailbox MUST BE treated as case sensitive.
https://tools.ietf.org/rfc/rfc5321.txt

See

pydantic/pydantic/networks.py

Line 383 in 7901711

return name or email[: email.index('@')], email.lower()

• OS: Any
• Python version import sys; print(sys.version): Any
• Pydantic version import pydantic; print(pydantic.VERSION): 0.32.2

Where possible please include a self contained code snippet describing your bug:

import pydantic
assert pydantic.EmailStr.validate('AbC@example.com') == 'AbC@example.com'

[samuelcolvin]

Thanks for reporting, PR welcome to fix this.

[dmontagu]

Closing as it looks like this was addressed by #801. Thanks for the contribution @henriklindgren!

[slavugan]

this RFC 5321 looks outdated as most email services works with emails as case insensitive, and following this RFC just complicates our life. just IMHO.

[emilpaw]

Is there a simple way to get the old behavior back?