First: We talk about the date/time SENDING the Mail:
This date/time is then displayed in the forwarded mail together with the time zone. So you can see the exact/correct time. Worldwide.
Your actually timezone is +1, right? Thats why EGw displays 10:46:31.
If you are in another timezone (traveling…), you can set your prsonally timezone in EGw. The EGw displays the dates in your local time. Where ever you are…
I just watched this on the Thunderbird. That’s exactly how they do it.