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We need to be able to send an email with cfmail to an email address that contains a latin a with acute. I assume we'll eventually have to allow other Unicode characters too - a sample email address is foobá[email protected]. ColdFusion throws an error on this email address, which is technically valid. Since the acute a is a UTF-8 character, and the default encoding for cfmail is UTF-8, I'm not sure what other settings I would need to enable to make this work. Is this possible?
The error I get is Attribute validation error for tag CFMAIL.
Detail: The value of the attribute to, which is currently foobá[email protected], is invalid.
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To use Unicode in certain email header fields, e.g. subject lines, sender and recipient names, the Unicode text has to be encoded using a MIME "Encoded-Word" with a Unicode encoding as the charset. To use Unicode in domain part of email addresses, IDNA encoding must traditionally be used.
Sends an email message that optionally contains query output, using an SMTP server. <cfmail to="" from="" subject=""> cfmail(to="", from="", subject=""); CFDocs.
I'm neither an I18N nor email expert but my understanding FWIW is that current systems don't generally support unicode in the local part of the email address, i.e. the mailbox name before the @. Local mail servers may support it and allow a name such as foobár internally, but if that person wants to receive mail from the outside world they will also need an ASCII alias such as foobar.
There is however a mechanism for supporting unicode in the domain portion of the address, which involves conversion to an ASCII representation called punycode. This means an address such as foo@foobár.com will be converted to [email protected] which current DNS and mail systems will accept.
It's possible to do this conversion in ColdFusion by using existing Java libraries. For more detail see this question.
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