You’re awesome, but you’ve got one step left:
Check your inbox for an activation email and be sure to add firstname.lastname@example.org ¹ to your whitelist. This will keep these emails out of your spam folder. Now, if you have Gmail and just got those new tab thingies, it’s likely that the activation email will be under Promotions.
1I know that may not make sense, but that is who I use to send out the newsletter. (I am also a Director at FeedBlitz for my day job, so I’m really biased.