Services like BlueBottle and SpamArrest are basicly an intermediate between the sender of the e-mail and the receiver of the e-mail in order to prevent spam from ending up in the receiver's mailbox.

So when somebody has an e-mail address hooked up to BlueBottle (or similar service), and somebody sends an e-mail to this address, the sender gets a reply from BlueBottle with the request to confirm he is a real person and that the sended e-mail is not a spam message.

When the sender clicks this confirmation link BlueBottle will let the message through and deliver it to the receiver.

I really like these kind of systems, as they can push back the amount of spam you receive daily quite a bit.

But unfortunatly there's also a down side.

When you submit a gallery/free site, more likely than not you will receive an e-mail which includes a link you need to click in order to confirm your submission.

If the e-mail address you used to submit is hooked to BlueBottle, the sender (the site you submitted your gallery/free site to) will receive a confirmation message from said service first, and will need to confirm it's not spam before you will get your submission confirmation e-mail in your inbox.

As the nice guy as I generally am (*cough*) I've just gone through about 20 of these BlueBottle/SpamArrest confirmation messages a few minutes ago so that the webmasters could receive their submit confirmation messages, but I can very much imagine that not each and every webmaster who runs a TGP or Link List will do this for you in order to get the confirmation e-mail into your inbox.