有效的邮件地址正则expression式

我做了一些testing,但我想问问,如果有人看到这个ruby正则expression式的电子邮件validation问题:

/\A([^@\s]+)@((?:[-a-z0-9]+\.)+[az]{2,})\Z/i 

看起来不错?

你很近,不得不添加几个字符:

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(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\". \[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t])*)(?:\.(?:(?: \r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\[ "()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)?[ \t]))*"(?:(?:\r\n)?[ \t]) *))*@(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t]) +|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*)(?:\ .(?:(?:\r\n)?[ \t])*(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(?:(?:\r\n)?[ \t])+|\Z |(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)*\](?:(?:\r\n)?[ \t])*))*\>(?:( ?:\r\n)?[ \t])*))*)?;\s*) 

不,我不是在开玩笑: http : //www.ex-parrot.com/~pdw/Mail-RFC822-Address.html

人们总是错过的一个有效字符是'%'字符。 它执行内部路由方向。 请参阅电子邮件地址部分17.3.3 。

请注意,这被视为遗产。 但是这表明你正在寻找一些相当复杂的东西。 我可能只是检查一个@字符和一个合适的域名后缀。

编辑:我忘了。 你现在可以得到Unicode域名,例如http://☃.net/(Stackoverflow的HTML编辑器有点混淆了)

validation电子邮件地址往往比你想象的更复杂。

  • 相关问题: 什么是validation电子邮件地址的最佳正则expression式?

没关系,除非你阻止了IDN顶级域名 🙂

RFC 5322标准。

允许使用点primefaces本地部分,引用string本地部分,过时(混合点primefaces和引用string)本地部分,域名域(IPv4,IPv6和IPv4映射的IPv6地址)域字面值域,和(嵌套的)CFWS。

 '/^(?!(?>(?1)"?(?>\\\[ -~]|[^"])"?(?1)){255,})(?!(?>(?1)"?(?>\\\[ -~]|[^"])"?(?1)){65,}@)((?>(?>(?>((?>(?>(?>\x0D\x0A)?[\x09 ])+|(?>[\x09 ]*\x0D\x0A)?[\x09 ]+)?)(\((?>(?2)(?>[\x01-\x08\x0B\x0C\x0E-\'*-\[\]-\x7F]|\\\[\x00-\x7F]|(?3)))*(?2)\)))+(?2))|(?2))?)([!#-\'*+\/-9=?^-~-]+|"(?>(?2)(?>[\x01-\x08\x0B\x0C\x0E-!#-\[\]-\x7F]|\\\[\x00-\x7F]))*(?2)")(?>(?1)\.(?1)(?4))*(?1)@(?!(?1)[a-z0-9-]{64,})(?1)(?>([a-z0-9](?>[a-z0-9-]*[a-z0-9])?)(?>(?1)\.(?!(?1)[a-z0-9-]{64,})(?1)(?5)){0,126}|\[(?:(?>IPv6:(?>([a-f0-9]{1,4})(?>:(?6)){7}|(?!(?:.*[a-f0-9][:\]]){8,})((?6)(?>:(?6)){0,6})?::(?7)?))|(?>(?>IPv6:(?>(?6)(?>:(?6)){5}:|(?!(?:.*[a-f0-9]:){6,})(?8)?::(?>((?6)(?>:(?6)){0,4}):)?))?(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(?>\.(?9)){3}))\])(?1)$/isD' 

RFC 5321标准。

允许使用点primefaces本地部分,引用string本地部分,域名域和(IPv4,IPv6和IPv4映射的IPv6地址)域字面值域。

 '/^(?!(?>"?(?>\\\[ -~]|[^"])"?){255,})(?!"?(?>\\\[ -~]|[^"]){65,}"?@)(?>([!#-\'*+\/-9=?^-~-]+)(?>\.(?1))*|"(?>[ !#-\[\]-~]|\\\[ -~])*")@(?!.*[^.]{64,})(?>([a-z0-9](?>[a-z0-9-]*[a-z0-9])?)(?>\.(?2)){0,126}|\[(?:(?>IPv6:(?>([a-f0-9]{1,4})(?>:(?3)){7}|(?!(?:.*[a-f0-9][:\]]){8,})((?3)(?>:(?3)){0,6})?::(?4)?))|(?>(?>IPv6:(?>(?3)(?>:(?3)){5}:|(?!(?:.*[a-f0-9]:){6,})(?5)?::(?>((?3)(?>:(?3)){0,4}):)?))?(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])(?>\.(?6)){3}))\])$/iD' 

基本。

允许使用点primefaces本地部分和域名域(至less要求两个域名标签,TLD限制为2-6个字母字符)。

 "/^(?!.{255,})(?!.{65,}@)([!#-'*+\/-9=?^-~-]+)(?>\.(?1))*@(?!.*[^.]{64,})(?>[a-z0-9](?>[a-z0-9-]*[a-z0-9])?\.){1,126}[az]{2,6}$/iD" 

看看下面的链接。

比较电子邮件地址validation正则expression式

如何查找或validation电子邮件地址

堆栈溢出也有类似的问题 。