internationalised email addresses

[rerowep]

It should be possible to send emails to internationalised email addresses.
Following RFC describes the standard: https://datatracker.ietf.org/doc/html/rfc6531
With the python module smtplib it is already possible to send emails to internationalised email addresses as following:
server.sendmail(from_email, to_email.encode('utf-8'), msg.as_string(), ['SMTPUTF8'])

[lnielsen]

Do you have more information about where the problem occurs? Is that we not able to store this email addresses in Accounts, or is it Invenio-Mail/Flask-Mail that has a problem with it?

[rerowep]

It is not possible to send international email because flask mail makes a RFC sanity check in the utils.py::formataddr line 91 function.

    # The address MUST (per RFC) be ascii, so raise a UnicodeError if it isn't.
    address.encode('ascii')

The library libsmtp can send international emails. Following RFC's must be handeled:
https://tools.ietf.org/html/rfc6530 and https://tools.ietf.org/html/rfc6531

https://stackoverflow.com/questions/34040613/how-to-send-an-e-mail-to-the-international-address

[lnielsen]

This is a bit of a bigger task as it requires replacing Flask-Mail extension (which should anyway be done as it is unmaintained), so at this point I'm not sure when the work can be scheduled.

[rerowep]

What's the status for this issue. Unfortunately, we have data with international email addresses in our user database and we can't email these users. Is there already an idea with what flask-mail should be replaced with and could I help with that.