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A comment on MailChimp can’t process UTF-8 characters in email address prefixes.

Re:MailChimp can’t process UTF-8 characters in email address... by tyingq on Sunday July 23, 2017 @09:46AM (#14832228)
Pretty light on details. By "prefix", do they mean the local part of email address? Like the "someuser" in "[email protected]" ?

If so, it's not that unusual that it wouldn't be supported. The local-part used to be constrained to ascii only. RFC6530 (SMTPUTF8) added UTF-8 support, but it's optional. Google only started supporting it in 2014, for example: https://googleblog.blogspot.com/2014/08/a-first-step-toward-... Microsoft has support in some places, but not others, etc.

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Re:MailChimp can’t process UTF-8 characters in email address... by colinbartlett on Sunday July 23, 2017 @10:49AM (#14832502)
Correct, there's a Github issue linked[1] that shows åliå@test.com as an example.

1. https://github.com/charlesthk/python-mailchimp/issues/116

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Re:MailChimp can’t process UTF-8 characters in email address... by Twirrim on Sunday July 23, 2017 @11:06AM (#14832570)
It looks like that has been fixed:

https://github.com/charlesthk/python-mailchimp/commit/5a4ed6...

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Re:MailChimp can’t process UTF-8 characters in email address... by tyingq on Sunday July 23, 2017 @11:42AM (#14832760)
It was just mentioned to confirm that it was the "local-part" that was in question.

The article notes that fixing it in the python client doesn't fix the upstream lack of support on mailchimp's back end.

This just seems to be a case of high expectations. Support of utf8 local-part is spotty across lots of providers and software.

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