Deleted an email forever in Gmail, any chance of getting it back?

Check your filters as well, Settings > See all settings > Filters and Blocked Addresses. A filter set to delete is a really common reason mail seems to vanish without you touching it, and it'll keep happening to new ones.

Honestly, on a personal Gmail account, once it's gone from Trash it's very unlikely to come back. There's no restore button past that point. Worth checking before you give up: - All Mail. People often archive by accident and think they deleted it - your phone or a desktop mail program, if one was set up, may still have a downloaded copy as long as you don't let it sync first. Put it in airplane mode before opening it - ask the sender to forward it again, that's usually the quickest win If it's a work or school account it's a different story, the admin can restore deleted mail for a while after it's purged from Trash.