Mailform's Bulk Mail Tool is an efficient solution for individuals and small businesses to send customized letters in large quantities without the need for physical mailing processes. Users can upload multiple documents and recipient addresses, choosing from various printing options such as black and white or color, single or double-sided printing, and USPS Certified Mail. The platform supports integrations with services like QuickBooks, Box, Dropbox, Google Drive, FreeAgent, FreshBooks, and Harvest, streamlining the mailing process. Mailform is ideal for sending invoices, statements, reminders, proposals, and more, offering features like return envelopes to facilitate prompt client responses. By automating the bulk mailing process, Mailform saves time and resources, eliminating the need for manual printing, envelope stuffing, and trips to the post office.