I just spent a whole day with a similar problem After updating QB Desktop from 2022 to 2024 I lost my email setup. I tried to plug in the SMTP "address" that was for my Godaddy Outlook 365 email, but every time I treid to send a test email, it would never recognize my password.
Back and forth between Godaddy ("we haven't changed anything, go to QB") and QB ("our notes say that Godaddy is no longer compatible with QB") with no resolution. I finally read in this forum a mention that Godaddy has switched from Secure Server to an Outlook/365 setting.
So I went back into QB and chose "other", my email address and used SMTPOUT.SECURESERVER.NET, port 587. Bingo, it worked!
I have called Godaddy and QB tech support to offer my solution, since both have continued to get calls about this.
Hope this helps others.
