400+ Emails Sent . . ..66% open rate

Hello - I just relaunched my AllProWebTools this week and have sent 400+ emails but only .66% open rate. There already seems to be an issue. I think I may have to change the email account it's sending out of? Can I get some assistance?

Please start a screenshare so we can look into this for you. Here's how: https://www.allprowebtools.com/Support/