No workflow change
Keep using the Windows software your team already depends on.
Keep your old apps.Use modern email.
Send email from legacy Windows applications through Gmail without changing the software your team already depends on.
- Local preview
- Secure OAuth
- Easy setup
Legacy Windows appSimple MAPI action
SendArcMAPI bridge
GmailGoogle Workspace
Key benefits
Use Gmail
Send through Gmail or Google Workspace with your existing account.
Secure by design
OAuth tokens stay in Windows Credential Manager. No inbox access.
Focused setup
A small Windows utility, not another desktop mail client.
Three clear steps
How it works
Message content stays on your PC until you explicitly send it to Google.
- 1
Install SendArc
Install the Windows beta and let SendArc register as the Simple MAPI handler.
- 2
Connect Google
Sign in to one Gmail or Google Workspace account with the gmail.send permission.
- 3
Preview, then send
Review recipients, subject, body, and attachments locally. Send only when ready.
Why SendArc
A bridge, not another inbox.
SendArc keeps a narrow job: help existing line-of-business software hand an outgoing message to Gmail safely.
- Works with supported Simple MAPI calls
- No new desktop mail client to learn
- Local-first message handling
- Open-source code and inspectable releases
Legacy app friendly
Designed for the Windows send actions that older business tools still use.
Local preview
Review the complete outgoing message before any send request leaves the PC.
Least privilege
The beta asks for gmail.send, not mailbox reading or search access.
Direct to Google
No SendArc-operated relay receives your message content.
Business beta
Help shape SendArc for teams.
Planned business beta: $29/year per seat. No charge today.
Tell us how many seats and which Windows workflow you need. The signal helps prioritize compatibility, deployment, and support work without building billing first.
Never include email bodies, recipients, OAuth tokens, private attachments, or confidential client data.
Straight answers
Frequently asked questions
What is SendArc?
SendArc is a small Windows utility that receives Simple MAPI email actions from compatible desktop software, shows a local preview, and sends the confirmed message through Gmail.
Do I need to replace Gmail?
No. SendArc uses the Gmail or Google Workspace account you connect. It does not replace Gmail and it does not operate an email relay server.
Do I need Thunderbird or Outlook?
No desktop mail client is required for SendArc's supported Gmail flow. Your existing Windows application starts the message, and SendArc handles preview and sending.
What Windows applications work?
SendArc targets applications that call the Windows Simple MAPI send function. Compatibility varies by application and architecture, so the public beta documents only tested workflows and invites sanitized compatibility reports.
Does SendArc read my inbox?
No. The beta requests no mailbox-read permission. Pending message data stays on your Windows device until you send or discard it.
What Gmail permissions does SendArc request?
The beta requests only gmail.send, the narrow Gmail permission needed to send a message after you confirm the local preview.
Is SendArc affiliated with Affixa?
No. SendArc is an independent open-source project and is not affiliated with Affixa or Notably Good Ltd.
Is SendArc open source?
Yes. SendArc is derived from go-mapi and publishes its corresponding source under LGPL-3.0-or-later, with upstream and third-party notices preserved.
What does Business Beta cost?
The planned signal price is $29 per seat per year. There is no charge today; the form only records interest and workflow needs.
What happens if SendArc does not work with my software?
Keep your current mail-handler setup until the beta is verified for your workflow. Submit a sanitized compatibility report and never include private message content, OAuth tokens, or attachments.
Windows beta
Ready to send from the software you already use?
Gmail and Google Workspace only. No desktop mail client required.