Why is my email campaign not sending to my full list?

[theoldtownshop]

I sent out an email campaign on Monday to my entire email list. When I went to check on my campaign I saw that it sent to 500 less people. And from that number 100 less actually received the email. Not sure what is going on here because I have changed nothing with regards to my email list. When I go into contacts the right number of subscribed followers are shown. Any ideas why my email is not being sent to everyone?

[JJ_]

Hey there @theoldtownshop

This sounds like a good question for our Square Marketing team. 

They can take a look at your account alongside you to pinpoint what's going on here. Please reach out by phone or email when you have a moment by logging into your Square account and heading here.