Olivier Mueller writes:
This happens with the latest Thunderbird version, and the message source file in maildir looks relatively normal, the only thing that is maybe causing the issue is that there are non encoded UTF8 chars in the subject: (also without "=?utf-8?...").> From: "Hôtel Mercure" <sur...@xyz.com>
Which is only valid in Unicode-formatted E-mail. This was never valid formatting pre-Unicode.
But at the end the message is rendered just fine in all my mail clients,
Maybe so, but it doesn't change the fact that wherever this message came from, its formatting was invalid pre-Unicode, and is now only valid in Unicode E-mail.
also thunderbird, so my question would be: is this alert really necessary or couldn't we just disable it (or at least make it configurable) in a later version of courier-imap ?
This alert is required by RFC 6855: https://tools.ietf.org/html/rfc6855 # When a message that requires SMTPUTF8 is encountered and the client # does not enable UTF-8 capability, choices available to the server # include hiding the problematic message(s), creating in-band or # out-of-band notifications or error messages, or somehow trying to # create a surrogate of the message with the intention of providing # useful information to that client about what has occurred.
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