Newsletter isn't sending when it says it has

Hey there!

I've got the latest wordpress running, and latest version of Newsletter. I'm also using the wp smtp email plugin.

The settings on that plugin are correct and I'm getting the test email when I test. The settings on Newsletter are also correct, and I'm getting the test email when I hit test.

I just tried to send a newsletter to 1200 members, and in the "newsletter" area it says it went out to everyone, but it's not actually getting received by newsletter members. I'm on the list, and I never got it, and I checked all my gmail folders and spam.

I also tried sending a preview email to my own email address, and it says it went out, but I never received it.

Can I get some help resolving this please?