How do signatures actually get deployed?

Through the platforms' own APIs: Gmail sendAs for Google Workspace, and the add-in or transport integration for Microsoft 365. Mail flow and MX records are untouched.

Yes — an org-scoped tokened REST API plus an MCP server so agents like Claude or Cursor can operate signatures safely.

How is access controlled?

Four roles enforced server-side, per-feature RBAC, SSO/SCIM on Enterprise, and audit logging of every administrative change.

What happens if OwnSig has an outage?

The recipient-facing edge keeps resolving, and deployed signatures live in the mail platform — email keeps flowing.

Can we isolate our tenant completely?

Enterprise tenants can get a dedicated cell: own database, services, and edge, with login subdomain that rejects other tenants' users.

Server racks with status lights in a data centre aisle

OwnSig·Information Technology

Retire the transport-rule spaghetti

One console deploys on-brand signatures to every mailbox through native M365 and Google APIs — with SSO, SCIM, RBAC, and an API your automation can drive.

Start free — 14-day Pro preview Request a proof of concept

IT ops · identity · enterprise architecture · platform engineering

Message · IT signature

Thanks for the update — looping in the right folks on our side.

Marcus Chen

Principal Engineer, Identity

Northwind Systems

IT · Seattle · marcus.chen@northwind.example

Status · status.ownsig.com

Confidential — for intended recipients only.

Least-privilege scopes. No MX changes. Mail flow stays yours.

Photo · Unsplash

Native

M365 & Google deployment

SSO/SCIM

identity-first access

API+MCP

for scripts and agents

Native APIs, not transport-rule archaeology.

Photo · Unsplash

The problem

What breaks when signatures are left to individuals

Fragile scripts

Exchange transport rules and PowerShell hacks break on every change and render differently per client.

Ticket volume

Every title change, logo refresh, and campaign becomes an IT ticket that marketing waits on.

Security review pain

Point tools with broad mailbox permissions and vague data handling fail vendor risk assessments.

How it works

From policy to every mailbox

Policy once · deploy everywhere · measure what the outbox actually does

01
Connect identity and mail
SSO/SCIM for users; native Gmail sendAs and Outlook/Exchange deployment — no mail rerouting.
02
Hand marketing the console
Campaigns and templates with guardrails you configure. Tickets stop; audit logs continue.
03
Automate the edge cases
REST API and MCP server let scripts and agents list, update, and lint signatures safely.

Capabilities

What OwnSig puts under control for it

Native deployment

Gmail sendAs and Outlook add-in / transport integration — least-privilege scopes, no MX changes.

Self-service with guardrails

Marketing runs campaigns, HR data flows automatically, users get exactly the editing rights you configure.

Identity-first

SAML/OIDC, SCIM, four-level RBAC, SSO-only mode, and dedicated login subdomains per tenant.

API + MCP server

Tokened REST API and Model Context Protocol server for scripts and AI agents.

Trust & compliance

Made to pass your own review

Microservice isolation for recipient-facing traffic, tenant secrets in envelope encryption, exportable audit logs, live status with real probes, and dedicated single-tenant cells on Enterprise.

Read the security & compliance detail

In the field

Dig deeper for information technology

Case study · Enterprise software

A 6,500-seat software company closed the signature ticket queue for good

Northwind's IT team was drowning in signature tickets and maintaining fragile Exchange transport rules. A zero-touch model — HRIS sync, rule-based assignment, native deployment, and a transport-layer backstop for mobile and webmail — removed IT from the per-signature loop entirely.

~0: signature tickets after go-live
6,500: seats on zero-touch assignment
100%: client coverage incl. mobile & webmail

Read the case study →

Representative composite based on common deployments in this industry — not a single named customer. Figures illustrate the outcomes the described controls are designed to produce.

White paper · 8 min read

Zero-Touch Signature Management

Deploying, governing, and measuring signatures across Microsoft 365 and Google Workspace without touching mail flow

Written for For IT administrators, messaging engineers, and endpoint teams

Get the white paper →

Information Technology — frequently asked

How do signatures actually get deployed?: Through the platforms' own APIs: Gmail sendAs for Google Workspace, and the add-in or transport integration for Microsoft 365. Mail flow and MX records are untouched.
Is there an API?: Yes — an org-scoped tokened REST API plus an MCP server so agents like Claude or Cursor can operate signatures safely.
How is access controlled?: Four roles enforced server-side, per-feature RBAC, SSO/SCIM on Enterprise, and audit logging of every administrative change.
What happens if OwnSig has an outage?: The recipient-facing edge keeps resolving, and deployed signatures live in the mail platform — email keeps flowing.
Can we isolate our tenant completely?: Enterprise tenants can get a dedicated cell: own database, services, and edge, with login subdomain that rejects other tenants' users.

OwnSig

On-brand, compliant signatures for your whole team by Friday.

Get started free See pricing

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