Printer Repair Questions? Ask IT Technicians for Answers ASAP
Hi, I'm Sadique. Welcome to JustAnswer. I'm reviewing your question now and will post back with your reply ASAP.
I would suggest you go for HP OfficeJet Pro 8720 All-in-One Printer series.
It's one of the best inkjet printers from HP which supports printing on Monarch Envelopes 3.9" x 7.5"