什么是最长的电子邮件地址？ [英] What is the longest possible email address?

问题描述

可能重复：

超过最大电子邮件地址大小

是否有技术限制电子邮件地址可以多长时间？在不同的主要电子邮件提供商（Google，Microsoft等）是否有实际限制？

Is there a technical limitation to how long email addresses can be? Are there practical limitations imposed by the different major email providers out there (Google, Microsoft, etc.)?

在法律上或事实上，是否有限制的电子邮件地址中的字符？

De jure or de facto, is there a limit on the number of characters in an email address?

推荐答案

电子邮件地址的最大长度是多少？

What is the maximum length of an email address?

254个字符

这源自一个域的最大长度的简单算术
255个字符）+邮箱的最大长度（64个字符）+ @
符号= 320个字符错误。这个菜单实际上记录在
原始版本的RFC3696中，在勘误表中已更正。
实际上，RFC5321在
SMTP事务的路径元素上有256个字符的限制，但是这包括围绕电子邮件地址的尖括号
，所以电子邮件地址的最大长度为
254个字符。 - Dominic Sayers

"This arises from the simple arithmetic of maximum length of a domain (255 characters) + maximum length of a mailbox (64 characters) + the @ symbol = 320 characters. Wrong. This canard is actually documented in the original version of RFC3696. It was corrected in the errata. There's actually a restriction from RFC5321 on the path element of an SMTP transaction of 256 characters. But this includes angled brackets around the email address, so the maximum length of an email address is 254 characters." - Dominic Sayers

- > http://www.eph.co.uk/resources/email-address-length-faq/

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