Hi James...Thanks for verifying my feed.
I've tried contacting Feedburner, but they really don't provide support any longer.
As an alternative, I set up an RSS-Driven campaign on Mailchimp. I've used MC to send newsletters in the past.
No luck...sends test emails, but they're not received. I've tried several accounts...both mine and friends, to make sure it's not an email client problem.
And now when I go back to a previous campaign that worked fine and try to send a test email, MC says it's send and delivered, but it doesn't arrive anywhere, just as with the blog posts.
I've tried switching themes, disabling plugins...it's driving me nuts!
I know the date this problem began, more than 30 days ago, if that helps.
Further thoughts? Thanks for the help.