Does spaghetti code hurt email delivery?

How much of a role does spaghetti code play in delivery of emails? Eg; does it cause it to go spam folder?

I'm trying to decide if I want to copy/paste from a word/google doc onto my Active Campaign newsletters in an effort to keep the styling and reduce workload.

Or copy/paste onto Notepad and then onto AC. This would omit the spaghetti code and keep it clean. But it means I have to restyle the newsletter inside the editor.

My newsletters are pretty minimal when it comes to HTML

Thank you

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source https://www.reddit.com/r/Emailmarketing/comments/k8ngcc/does_spaghetti_code_hurt_email_delivery/