I am also having this problem with estimates and invoices. Simple fix here, once the invoice or estimate is created you press email and it drops the .pdf into what ever mail program you use as a new message to the customers email on file just like the desktop version did flawlessly. There is absolutely no reason why this can’t be re worked. You guys push switching to online so much, these issues should be worked out. I don’t have time as a business owner to go back and forth making sure people are receiving emails, this isn’t 1996. Don’t reply with a copy/paste generic response either. Escalate this to the developers. Clearly this is an issue and hasn’t been resolved for YEARS.