when replying, DeltaChat does not set the IMAP tag \replied

[gerryfrancis]

Expected behavior:

When replying to an email, the replied message gets the IMAP flag \Answered. Then, many clients have a specific icon in the UI to notify the user about it. This is very useful for tracking unreplied emails.

Actual behavior:

When replying to an email, no IMAP flag is set.
Steps to reproduce the problem:

• Reply to an email x.
• List IMAP flags for x

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Originally reported by @monperrus, see deltachat/deltachat-android#3647 .

[hpk42]

On Fri, Mar 07, 2025 at 00:58 -0800, gerryfrancis wrote: gerryfrancis created an issue (chatmail/core#6622) ### **Expected behavior:** When replying to an email, the replied message gets the IMAP flag \Answered. Then, many clients have a specific icon in the UI to notify the user about it. This is very useful for tracking unreplied emails.

These days we generally recommend to use dedicated chatmail addresses/accounts. Sharing an e-mail address with other clients is supported but not recommended and it is not bound to receive much energy for now. Independently, it's also not clear when this "\Answered" flag should be set precisely. Not all replies are quote-replies in a chat messenger. Lastly, chatmail is about pervasive end-to-end encryption with metadata protection and such a "cleartext" answered-flag would leak metadata.