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There's nothing technical DNS-wise that would prevent the name 'canon' from resolving to an IP address, so http://canon http://canon could work. They could als
by durana 17y ago
There's nothing technical DNS-wise that would prevent the name 'canon' from resolving to an IP address, so http://canon http://canon could work. They could also add a MX record for the name 'canon' so @canon e-mail addresses would work too. Maybe ICANN has rules around gTLDs that would prevent this type of use?
- rbranson 17y agoI'm sure this will break a ridiculous number of regular expressions for email address validation.
- jedberg 17y agoYes, but that is their own fault for trying to use a regex to validate email addresses. :)
- atlbeer 17y ago(?:(?:\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])))@(?:(?:\r\n)?[ \t])(?:[^()<>@,;:\\".\[\] \000-\0 31]+(?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)\ ](?:(?:\r\n)?[ \t]))(?:\.(?:(?:\r\n)?[ \t])(?:[^()<>@,;:\\".\[\] \000-\031]+ (?:(?:(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|\[([^\[\]\r\\]|\\.)\](?: (?:\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])(?:[^()<>@,;:\\".\[\] \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]))?(?:[^()<>@,;:\\".\[\] \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]))|(?:[^()<>@,;:\\".\[\] \000-\031]+(?:(? :(?:\r\n)?[ \t])+|\Z|(?=[\["()<>@,;:\\".\[\]]))|"(?:[^\"\r\\]|\\.|(?:(?:\r\n)? 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- _dan 17y agoI wish people would stop posting that. Yes, that covers most (though not all) of the RFC definitions of what constitutes an email address, but in practice you only want to accept a tiny subset of those.
- statictype 17y agoCurious: Why would you want to accept only a tiny subset of those? What do you gain by that?
- _dan 17y agoWell, the really simple example is the string "postmaster". It is a perfectly legitimate email address, and almost always deliverable. But rarely something you want to actually accept.
- reconbot 17y agoregardless of the rules there are a few tlds that route mail and resolve to websites. http://to./ http://to./ comes to mind, but there are a few others.