RFC 2822兼容（大部分）电子邮件地址正则表达式

Posted 2021-02-26

This regular expression will match almost all valid email addresses. Omits email addresses containing double-quotes and square brackets, which while valid according to [RFC 2822][rfc2822], are almost never used.

[rfc2822]: http://tools.ietf.org/html/rfc2822 "RFC 2822"

[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?