Delivery notifications seem to report whether it was sent to the first-hop smtp server. However, that is just my local MTA, and always immediately shows as successful. I’d like to be able to configure Delta Chat to instead show a checkmark when my email has reached the last hop, via a delivery status notification.
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Possible to implement because e.g. mailcow supports DSN extension (RFC 3461 - Simple Mail Transfer Protocol (SMTP) Service Extension for Delivery Status Notifications (DSNs)), but will likely be unreliable as you can’t be sure the recipient server supports this extension.
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Hopefully sometimes Mailprovider will see, Chat via Mail is a new market an can help to keep Mail alive
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Well if your friends are running their own mail server that’s not a problem.