Your emails,
dressed right.
Automatically inject branded, consistent email signatures across your entire organisation. No plugins. No client-side software. Just beautiful, on-brand emails — every time.
Microsoft 365
Built exclusively for M365
Enterprise Secure
Zero email content stored
Zero Touch Setup
Up and running in minutes
Benefits
Why teams choose SigDaddy
From brand consistency to engagement tracking, SigDaddy transforms your team's email communication.
Total Brand Consistency
Every email from every employee carries your brand. Professionally designed signatures, applied automatically.
- 15+ professional templates
- AI-powered signature generator
- Custom HTML template editor
Zero IT Overhead
No software to install, configure, or maintain. SigDaddy works server-side — completely invisible to your users.
- No desktop agents or browser extensions
- Works with Outlook, web, mobile
- Automatic user data from Microsoft 365
Email Intelligence
Know when your emails are read and links clicked. Real-time notifications keep your team in the loop.
- Open and click tracking
- Push notifications
- Smart bot detection
Complete Control
Group-based signatures, user exclusions, per-domain templates — you decide who gets what.
- User groups with override signatures
- Exclude specific users
- Per-email opt-out via category
Dynamic Content
Personalise signatures automatically using live Microsoft 365 data. Add banners, announcements, and OOO messages.
- 12 merge fields from M365 profiles
- HTML snippets (banners, promos)
- Out-of-office smart signatures
Enterprise Security
Your email content never touches our servers. We preserve DKIM signing and use Microsoft's own Graph API.
- DKIM signature preserved
- Zero email content stored
- Full audit trail
How It Works
Three steps. Five minutes.
SigDaddy intercepts outbound email from your Microsoft 365 tenant, injects your branded signature, and delivers the email — all in milliseconds.
Connect Your Tenant
Sign in with your Microsoft admin account. SigDaddy configures a mail flow connector in Exchange Online — no manual setup required.
Design Your Signatures
Choose from our gallery of 15+ templates, use the AI generator, or build your own with our HTML editor. Merge fields auto-fill from M365.
Emails Just Work
Every outbound email is automatically signed. Track opens and clicks, manage from the portal, and never worry about inconsistent signatures again.
User sends email
Outlook / Web / Mobile
SigDaddy processes
Signature injected
Recipient receives
Branded email delivered
Pricing
Simple, transparent pricing
Two plans to fit any team. Start with a free trial.
Per Mailbox
Pay for what you use
From 1 mailbox • 75 emails/mailbox included
- Professional signature templates
- AI signature generator
- Open & click tracking
- Push notifications
- HTML snippets & banners
- User groups & exclusions
- Full audit trail
- Overage: $0.01 per extra email
Unlimited
Flat rate, no surprises
Volume pricing from 10 to 1,000 mailboxes
| Mailboxes | Per Mailbox | Monthly |
|---|---|---|
| 10 | $1.00 | $10.00 |
| 25 | $0.99 | $24.75 |
| 50 | $0.99 | $49.50 |
| 100 | $0.97 | $97.00 |
| 200 | $0.93 | $186.00 |
| 500 | $0.83 | $415.00 |
| 1,000 | $0.65 | $650.00 |
- Unlimited emails — no overage
- Everything in Per Mailbox plan
- Predictable monthly billing
- Volume discounts up to 35% off
Available on Azure Marketplace and Microsoft AppSource
Built for Microsoft
Exclusively for
Microsoft 365
SigDaddy is purpose-built for Microsoft 365. We use the Microsoft Graph API to send emails, preserving your DKIM signatures and SPF alignment. No third-party SMTP relay. No deliverability risks.
Microsoft 365
Ready to dress your emails right?
Join organisations that trust SigDaddy to deliver consistent, professional email signatures across every email, every device, every time.