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RFC 2822 - style email address validation for Python

Project Description

This module provides a single method, valid_email_address(), which returns

True or False to indicate whether a given address is valid according to the ‘addr-spec’ part of the specification given in [RFC 2822] ( Ideally, we would like to find this in some other library, already thoroughly tested and well- maintained. The standard Python library email.utils contains a parse_addr() function, but it is not sufficient to detect many malformed addresses.

This implementation aims to be faithful to the RFC, with the exception of a circular definition (see comments inline), and with the omission of the pattern components marked as “obsolete”.

Yes, all this really does is build a big regular expression. But it builds it in nice pieces that correspond to the RFC, and there’s a big bunch of unit tests that try to ensure each little piece of the regexp works as intended. (See

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