Can’t send email from new computer

I purchased a new computer. I replace the hard drive from my old computer to the new computer. Everything works great, but I can’t send email using em client ver 7.? . Can someone tell me why.

I am using IMAP
ISP is spectrum

martes 13 octubre 2020 :: 0854hrs (UTC +01:00)

Hi @Denn

You are running eMC v7.* you should consider upgrading to v8.0.3385 (83a873c)

Here is a link to your ISP setup page

¡Saludos desde la soleada España!