Is your feature request related to a problem? Please describe.

With a single email message, it is not immediately apparent who the email was actually sent to, e.g. Cc, without downloading the email and opening the .eml file.

Describe the solution you'd like

When you can view the entire email header at a glance or with a single click (for space reasons) without having to download the .eml file.

Here, too, I would suggest the same as for Gmail: simple but very effective.

Describe alternatives you've considered

1. In an email conversation, the email addresses involved are displayed at the top of the right-hand column, but these are usually based only on the first email in the entire conversation. However, it is common for certain emails in the conversation to have different recipients in the Cc field than others, etc. This means that this display is not always accurate and does not refer to a single email in the entire conversation. This address display is therefore not particularly useful.
2. If there are multiple recipients, the “Reply All” option (button) is displayed, indicating that there are multiple recipients, but you can only see them when you click on “Reply All” and a draft message opens. This is quite a workaround if you just want to know the recipients of a single message.
3. View source or download message (eml file) – both are very inconvenient if you just want to quickly read the basic information in the email and are only a workaround.

Additional context

No response