I use a simple email subscription plugin to manage subscribers to the blog. There is an option for a single opt-in and a double opt-in.
For single opt-in, which I've used up to now, you only need to provide an email address you are subscribed. For the double opt-in, the plugin sends you a confirmation email that you need to acknowledge before you are put on the subscription list.
As my site and YouTube channel (which I link to this site with) have grown in popularity, I've noticed lately that I've gotten subscriptions using suspicious email addresses, like "firstname.lastname@example.org". While this may be valid, I don't want to take the chance of it being someone who has some way to hack into the website using that plugin.
So, from here forward, I will be using the double opt-in subscription. If you subscribe and don't acknowledge but your email looks legit, I will resend the confirmation email after about a week or so. If I don't hear anything after another week, I'll delete the request.
For current subscribers: Addresses that are obviously screwy will be deleted after the announcement of this post is sent. If I was wrong, please re-subscribe and acknowledge. Addresses that are questionable will receive a confirmation email. If I don't hear anything back, they'll be deleted. Addresses that are obviously valid will be left alone.
I apologize if this causes any inconvenience, but I'd rather not take any chances. Thank you to those of you that have subscribed and thank you for understanding as I transition to a safer option.