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https://issues.apache.org/jira/browse/VALIDATOR-275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13660536#comment-13660536
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Kiran commented on VALIDATOR-275:
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What about the javascript jcv_checkEmail method?
I tried with latest SVN code. For the email 'someone@abc_def.com', from Java it
said invalid but in javascript it isstill a valid email id.
> EmailValidator.isValid(String) follows RFC822 but violates RFC1034
> ------------------------------------------------------------------
>
> Key: VALIDATOR-275
> URL: https://issues.apache.org/jira/browse/VALIDATOR-275
> Project: Commons Validator
> Issue Type: Improvement
> Components: Framework, JavaScript
> Environment: All
> Reporter: Adam Gordon
> Fix For: 1.4.0 Release
>
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> Per RFC822, the domain portion of an email address may contain any ASCII
> character other than chars 0-31 (control characters), 32 (space character)
> and any of the following: "(", ")", "<", ">", "@", ",", ";", ":", "\", <",
> ".", "[", "]".
> However, RFC1034, the DNS Domain Name spec specifies that domain names can
> only contain alpha numerical characters and the hyphen/dot characters.
> The RFC's contradict each other and while technically the EmailValidator
> class is doing what it says (in that it does not guarantee to catch all
> errors) when one passes in an email address of the form foo@bar+3.com it
> yields a potentially bad email address which the user won't find out about
> until they actually try and send the email message. I've not yet found a
> mail server that accepts an email address of this format, however it is
> possible there are legacy systems out there that do support it.
> I realize that this is not a bug, per se, but it seems like EmailValidator
> should probably do something or provide some mechanism to ensure that the
> email address specified is as valid as possible than waiting until the
> message is actually sent before failing.
> I am, however, open to discussion.
> This bug was also filed against the JavaMail API's InternetAddress class
> here: https://kenai.com/bugzilla/show_bug.cgi?id=202
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