Well, email is not app, nor is browser addon. However, apps that use email or browser addons could very easily register with Subtome (see the Developer section)

Well, email is not app, nor is browser addon. However, apps that use email or browser addons could very easily register with Subtome (see the Developer section) so that if you used them, they'll show up. We also have added Blogtrottr as a default, and yes they provide emails... Again, SubToMe will not show you a foot long list of services, just the ones that you used in the past (thru the registration mechanism) or a couple default ones to get started.