Gift sent by mail yo winner and don't mark as received

It's rather difficult to get in touch with winners who have disabled steam profile comments and refuse to accept friend invites. Even commenting on winner's giveaways is no option here.

there's the risk of this winner seeing it

always remember this

if you are going to use humble links in the future - just wait till the giveaway ends, go to humble and request the gift link, and then add the gift link to the space where you would normally put a steam key on steamgifts - they are also accepted in that space and its how I do gift links, as emailing people rarely works here; too many people use throwaway email addresses when signing up and never update them to one that stays current (I don't add gift links, or request them from humble, straight away when I make the giveaway, as humble gift links are notorious for being insecure when left on humble for too long)
as for the link - if you managed to claim it, then no one else had claimed it as far as I am aware - so the winner truly did not get the email by the looks of it - contact support is the best option to figure it all out (IF you are unable to contact the winner in the interim and get it sorted)

send a reroll ticket and provide a screenshot of the email you sent to the winner (with dates visible). that should be enough.

1. Yes it means the person didn't redeem it
2. It's a good thing you did, because that person is permabanned on SteamGifts now, so he probably did something bad.
   Feel free to use the key yourself or create a new GA with it.

the winner has never made a giveaway so sadly they cant do that so unless they said thank you in their wins they are out of luck with sg. everything couldve been avoided if they were told about the emails from the start. good advice though if they did create a giveaway.

oh the winner is perma banned now. so what happens now xD