Hello,
Just a heads up since GoDaddy support sent you our way that this is a public community where regular users help each other out and we are not Microsoft employees.
To figure out what is going on with the GoDaddy email we need some more details first. You mentioned using Microsoft 365 Outlook and Office 2019. Are you talking about the New Outlook for Windows app compared to the classic Outlook 2019 desktop program?
Also I need to know how you are connecting to GoDaddy in the 365 version like if it is set up as IMAP POP or an Exchange account. Do you get any bounce back messages or error codes when the emails randomly fail to send or receive?
Let me know so we can trace where the disconnect is happening.