Thats gotta suck big time...but I think you are in pretty good shape and nothing to worry about
As far as I know, losing confirmation emails won't get you blacklisted...if anything, for those that require you to click on a link to confirm will only mean your submission won't be accepted.
And don't feel bad....I've done things that made my jaw dropped....example: working on a website composite in Photoshop and getting so into it for 6 hours, I forgot to save it. Long story short, something happened and I lost all the work done. I think you could hear me swear very loudly at 4am in the morning probably scaring neighbors...lol