I’ve been using Mailbox Forwarding (the company — yeah it’s a rather generic-sounding name) for about 4 months now and I’m happy with the service. I price-compared the various vendors in the US and found Mailbox Forwarding to have the combination of features and price point that seemed right for me.
Their interface is a little dated-looking, but it totally works on both iOS and Android mobile browsers just fine. The prices are excellent compared to a lot of the market leaders and they have all the features you’d expect: scanning, online archiving, shredding, letter and parcel forwarding, check deposit. I’d recommend them.