FlashAttach

Send personalized bulk emails with the right attachment every time. FlashAttach helps you match files, preview recipients, and send document batches with confidence.

About FlashAttach

FlashAttach by BlackSteelDigital is a Windows desktop app for sending personalized bulk emails where each recipient needs their own correct attachment. Users can import contacts from Excel or CSV, match files by name, ID, or custom fields, personalize the subject and email body, preview everything before sending, and deliver messages through Office 365, Gmail, or SMTP. It is useful for invoices, reports, payslips, certificates, school notices, client documents, and other workflows where sending the wrong attachment would create real problems.