Yes, MassMailer Docs does support Salesforce Lightning.
Thu, 14 Sep, 2017 at 5:09 AM
Behind the scenes MassMailer Docs stores files in the Rackspace Cloud Files. We will provision Rackspace Cloud Files Account to you at the time of the trial....
Thu, 14 Sep, 2017 at 5:11 AM
Yes. MassMailer Docs lets you drag and drop a single file or multiple files to upload them to Salesforce Standard or Custom Objects.
Thu, 14 Sep, 2017 at 5:12 AM