This event has been the first time I've PvPed enough to receive large numbers of Rewards of the Worthy emails. Some issues arise.
1. As with any other reward containers holding gear, you probably want to open them with a max level character.
2. It is said that your first Rewards of the Worthy of the day will include a geode with transmutation crystals. (It's a gold geode with at least 4 crystals.) Is this the first such email you RECEIVE or the first such email you OPEN? I used to think it was the latter, but I just got two such geodes opening mail today.
3. Do the email ever expired and lose their attachments? I suspect that the answer is yes, in the usual 30 days, despite some contraindications to that in the UI.
4. Pelinal's Boon Boxes, which have been sent along with the usual container in such emails for this event, sometimes yield a siege engine or forward camp. Are these tied to the alliance of the character who OPENS the email or the one who EARNS it? I think it's the former, but I haven't checked carefully.