# SendGrid Acquisition Brief
**Cold Bore Ballistics LLC — Confidential**
Last updated: 2026-06-06

> This document summarizes the CBB SendGrid account for acquisition due diligence. Written for a buyer's technical or business team. For operational detail, see `SendGrid_Architecture_Reference.md`.

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## What It Is

SendGrid is the transactional email delivery platform for Cold Bore Ballistics LLC. It is used exclusively for system-to-mailbox delivery — specifically, voicemail notifications from the ScopeDOPE IVR system. It is not used for marketing email.

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## Why SendGrid (Not M365)

M365 is the primary email platform for CBB. SendGrid was introduced specifically because:
- M365 app passwords are disabled by tenant security policy
- Entra ID client secrets are blocked by tenant policy
- These restrictions make M365 unsuitable as a relay for non-interactive system email (e.g., Twilio Functions)

SendGrid is purpose-built for transactional system email and integrates directly with the Twilio Function via API key — no OAuth flow, no interactive auth.

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## Assets Included in Acquisition

| Asset | Description |
|---|---|
| SendGrid free tier account | 100 emails/day; sufficient indefinitely at launch scale |
| Authenticated domain: `coldboreballisticsllc.com` | DKIM/SPF via CNAME — corporate sender domain |
| Authenticated domain: `scope-dope.com` | DKIM/SPF via CNAME — ScopeDOPE sender domain |
| `twilio-ivr` API key | Mail Send only — scoped to IVR voicemail dispatch |
| `claude-code-cli` API key | Full Access — operator/management use |

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## Integration Point

SendGrid has one active integration: the `ivr-voicemail-handler` Twilio Function. The Function calls the SendGrid Mail Send API (`POST /v3/mail/send`) to deliver voicemail notifications with subject tags and custom headers to the appropriate CBB team inbox.

All other email at CBB flows through M365 — SendGrid is not in the path for any user-facing or marketing email.

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## Cost Profile

| Item | Cost |
|---|---|
| Free tier (100 emails/day) | $0/month |
| Upgrade trigger | Only if daily volume approaches 100 emails |
| Upgrade path | Essentials plan: $19.95/month for 50,000 emails/month |

At current and projected near-term call volume, the free tier is sufficient indefinitely. The cost is zero.

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## Domain Authentication

Both CBB domains are authenticated via CNAME records in Namecheap (CBB account). DKIM and SPF pass on both domains, which means emails sent via SendGrid from `noreply@scope-dope.com` or `noreply@coldboreballisticsllc.com` are trusted by receiving mail servers and M365.

DNS records are documented in `SendGrid_Architecture_Reference.md`. A buyer inheriting the Namecheap account inherits these records automatically.

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## Credentials and Access

All API key secrets are stored in Azure Key Vault — no credentials in code or config files:

| Key | Vault | Secret name |
|---|---|---|
| `claude-code-cli` | `kv-cbb-shared-prod` | `sendgrid-claude-code-cli-secret` |
| `twilio-ivr` | `kv-cbb-shared-prod` | `sendgrid-twilio-ivr-secret` |

A buyer receives vault access as part of the Azure infrastructure transfer.

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## Portability

- SendGrid account ownership can be transferred by updating the account email address
- All configuration is documented and reproducible in under 45 minutes — see `SendGrid_Rebuild_Guide.md`
- No proprietary SendGrid features are used; the integration is a standard REST API call
- Domain authentication CNAME records are in Namecheap — they transfer with the domain

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## Acquisition Recommendation

SendGrid is a zero-cost, zero-risk dependency. It adds reliable transactional email delivery for the IVR system without touching the M365 tenant security posture. The free tier has no near-term upgrade pressure. Full rebuild from scratch takes under an hour.

For a ScopeDOPE-only acquisition, the `scope-dope.com` authenticated domain and the `twilio-ivr` API key are the only assets that need to transfer. The `coldboreballisticsllc.com` domain authentication stays with CBB Corporate.

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## Document Control

| Field | Value |
|---|---|
| **Document owner** | `jschwefel@coldboreballisticsllc.com` |
| **Classification** | Confidential (03_-_Confidential/) |
| **Location** | `OneDrive/CBB_Corporate/03_-_Confidential/Infrastructure/SendGrid/SendGrid_Acquisition_Brief.md` |
| **Cross-references** | `SendGrid_Architecture_Reference.md`; `SendGrid_Operating_Runbook.md`; `SendGrid_Rebuild_Guide.md` |
| **Created** | 2026-06-06 |
| **Last updated** | 2026-06-06 |
| **Next full review due** | 2027-06-06 |

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## Revision Control Block

| Rev | Date | Changed By | Reviewed By | Approved By | Summary |
|-----|------|------------|-------------|-------------|---------|
| 0.9 | 2026-06-06 | jschwefel | — | — | Initial release |
