User writes one or more filter "templates" comprised of the same choices as the current manual method then saved by user naming or numbering that template. When creating, provide a radio button option that will enter the EMAIL ADDRESS of the msg CURRENTLY IN FOCUS/HIGHLIGHTED, and choose "complete" or " after @" or "2nd dot/period from end". Example: can convert noreply@haveibeenpwned.com into contains haveibeenpwned.com and adds this as a NEW filter for that account. With focus/highlight on an email message, a "right click" or "header button" or "tool bar" button allows the user to choose the template by name or number created for it.
What is currently about 10 clicks + cut & paste BECOMES ABOUT 2 CLICKS