Zoho Invoice supports sending of Snail Mail invoices, but it's a manual process.  We need an option to auto-send Snail Mail invoices for Recurring Invoice profiles.

One of the reasons we switched to Zoho was because of the Snail Mail invoice option. Most cloud invoicing solutions don't offer it. We were surprised to discover later that it's a manual process. We still have plenty of customers that insist on receiving a printed invoice (whether we like it or not), so this is a critical need for us.