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Accounting & invoices
Send invoices, statements, receipts, and client-specific reports without manually pairing every PDF.
For emails where each recipient needs the right file
Stop checking attachments one by one.
FlashAttach helps you send personalized bulk emails with the correct attachment for each person — before a wrong invoice, report, payslip, or document lands in the wrong inbox.
Windows desktop app
Uses your own email account
Preview before sending
No subscription
The real problem
Bulk email is easy. Correct bulk email is hard.
When every recipient needs a different file, the job becomes a stressful matching exercise — not just a sending task.
The manual way
- ×Copy names and emails from a spreadsheet.
- ×Search folders for the right PDF, invoice, report, or document.
- ×Open, attach, double-check, send — then repeat.
- ×Hope no file was missed, duplicated, or attached to the wrong person.
The FlashAttach way
- ✓Import your Excel or CSV contact list.
- ✓Match files to recipients using names, IDs, or custom fields.
- ✓Preview each personalized email before anything is sent.
- ✓Send through Office 365, Gmail, or your SMTP account.
Product walkthrough
Check everything once. Then send with confidence.
The workflow is designed for the moment before you press send: who receives what, what the email says, and what still needs fixing.
1 Import contacts
Start with the spreadsheet you already use. FlashAttach reads your recipient fields for email and personalization.
2 Match attachments
Connect files to recipients and review missing or suspicious matches before sending.
3 Merge subject and body
Use fields like name, company, invoice number, date, or any column from your file.
4 Send and recover
Send from your own account, inspect the delivery log, and retry failed sends when needed.
Who it is for
Built for repetitive document sending, not generic newsletters.
FlashAttach is strongest when each recipient needs a personal file, personal text, or both.
HR
HR documents
Distribute payslips, contracts, certificates, and employee files with a preview step before sending.
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Schools & clubs
Send parent notices, student documents, membership files, or event material to the right people.
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Operations teams
Handle repeat batches of customer files, reports, confirmations, or updates from one controlled workflow.
What is included
The features support one goal: safe personalized sending.
Smart attachment matching
Match files to contacts and spot missing or questionable attachments before sending.
Merge fields in subject & body
Use spreadsheet columns to personalize the subject line and email body for each recipient.
Office 365, Gmail & SMTP
Send through accounts you control instead of a third-party email relay.
PDF split & rename tools
Prepare batches of individual files when your source document arrives as one larger PDF.
Delivery log
Review completed, failed, or skipped sends so the batch does not disappear into guesswork.
Multiple profiles
Keep separate sender setups for different accounts, clients, or workflows.
Practical trust, before social proof.
Local-first workflowFiles are processed on your Windows machine.
Your email providerOffice 365, Gmail, or SMTP handles sending.
Preview stepCheck recipients, fields, and files before sending.
Simple purchaseNo monthly software subscription.
Demo & license
Try the workflow. Unlock production sending when ready.
FlashAttach is sold through Gumroad as a Windows desktop software purchase. Download, test the flow, and decide if it replaces your manual one-by-one sending process.
FAQ
Questions before you test it?
Does FlashAttach send through your servers?
No. It sends through your configured Office 365, Gmail, or SMTP account.
Is this a newsletter platform?
No. FlashAttach is for controlled document batches where personalization and attachment matching matter more than marketing automation.
Can I personalize the subject line?
Yes. Merge fields can be used in both the subject and the email body.
Can I check before sending?
Yes. The preview/matching step is central to the workflow, especially for files that must go to the correct recipient.
Which Windows versions are supported?
FlashAttach is built for Windows 10 and Windows 11.
How are purchase, taxes, receipts, and refunds handled?
Checkout is handled by Gumroad. Gumroad shows the final price, available files, receipts, tax handling where applicable, and any refund terms before purchase.
Where can I read the privacy policy?
You can read it here: Privacy & GDPR.