Exchange & SMTP

Email signatures for Exchange and custom SMTP

Bring centralized, compliant signature management to Microsoft Exchange environments — on-premises or hybrid — and any SMTP infrastructure, with server-side stamping that nobody can bypass.

Server-side stamping

Absolute enforcement across every message

Signatures are injected into messages in transit, before delivery. There's no way for a user to bypass the policy, and coverage extends to every device and mail client — including mobile.

  • Signatures applied in transit for full enforcement
  • Supports on-premises and hybrid Exchange
  • Covers every device and mail client
  • Ideal for regulated, compliance-driven organizations
Absolute enforcement across every message
Custom SMTP

Works with any SMTP infrastructure

If your organization sends through custom SMTP servers, Instant Signer can stamp professional, compliant signatures into those messages too — extending consistent branding beyond Microsoft and Google.

  • Stamp signatures from custom SMTP sources
  • Consistent branding across mixed infrastructure
  • Automatic legal disclaimers on every send
  • Centrally managed from a single dashboard
Works with any SMTP infrastructure
Governance

Rules, disclaimers, and audit logs

Target signatures with a powerful rules engine, append conditional disclaimers, and keep a complete audit trail of every change for compliance and peace of mind.

  • Rules engine to target signatures precisely
  • Conditional legal and regulatory disclaimers
  • Complete audit logs of every change
  • Role-based access control for administrators
Rules, disclaimers, and audit logs
Get started

Make every email work harder

Join 2,500+ companies turning email signatures into their most consistent, on-brand, and measurable channel.

  • Free trial
  • No credit card to start
  • Live in an afternoon