Option to display domain names in uppercase in email addresses

[NickelCob]

I suggest adding an option in Thunderbird to display the domain part of email addresses in uppercase (e.g., instead of ).
This feature aims to improve visual detection of phishing or spoofing attempts by highlighting typographic anomalies in domain names (e.g., , ).
It could be implemented as a display-only option in the security or accessibility settings, without altering the actual content of messages or the addresses used for replies.
The goal is to enhance user awareness of homograph attacks while keeping the feature optional and non-intrusive.

[Jon]

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