MailPoet shows newsletter sent using PHP mail, account never receives (Bluehost)

I’m experiencing a weirdness.

I have MailPoet set to send. It sends. Dead emails bounce back.
Yay. So far, so good.

However, I never receive my newsletter (I subscribe, as a qa thing). Oddly, when I test it out using the send sample mail, it works. Just the mass mailing doesn’t (just under 320 emails, sent in batches of 50).

I recently moved from 1and1 to Bluehost, and since being on Bluehost, it sends-but-doesn’t-receive.

I’ve contacted them and they say there are no limitations with PHP Mailer.

Any suggestions? I normally have a 20 – 30% read rate, and since moving servers it reads 0%. Not good!

(I’m using the latest 2.7.11.3 version of MailPoet. I have 3 ready, but it didn’t migrate my newsletters over, so I’m not using it just yet….)

(I’ve set it with and without cron job enabled (geeky options))

The page I need help with: [log in to see the link]