Enterprise Private Cloud Solution

The world’s first email signature solution hosted in your own Azure Infrastructure


Trusted by customers worldwide

Key Features & Benefits of Private Cloud Solution

screenshot of microsoft enterprise

Secured Closed Loop

Crossware Mail Signature for Enterprise Private Cloud processes email for organisations in a Secure Closed Loop between Microsoft 365 and the Crossware SMTP Service – hosted in your own Microsoft Azure Infrastructure.

Private Cloud for large enterprises

Crossware Mail Signature has developed an Enterprise solution with all the same award-winning features of our standard offering with an extra level of security for organisations who are not allowed to loop through a 3rd party.

Technical Requirements

The Crossware SMTP processing engine has been developed to ensure a minimum Azure workload.

This cutting-edge solution uses the latest AKS (Azure Kubernetes Service) technology, making it easy to deploy and manage in your own Microsoft Azure environment.

Product Features

Crossware offers a wide range of enterprise-grade features that helps your email signatures stand out.


The user sends an email, from any device


Email goes from your Microsoft O365 into your organisation’s own Microsoft Azure Infrastructure


The email is then processed by the Crossware service hosted within your own Microsoft Azure Infrastructure, adding your branded and compliant email signature


The email is then returned to Microsoft O365 and delivered to the recipient with your beautiful email signature appended

Why Crossware Email Signature

Crossware offers the easiest and most powerful way to manage company email signatures.

Microsoft Preferred Solution
Trusted Worldwide
Over a Million Active User
20+ Years In Industry
Multi Award Winning

See why 200,000+ businesses choose Crossware to scale

Te Wananga initially discovered Crossware Mail Signature for Office 365 whilst exploring options for an email signature solution that could create uniformity for every employee. Crossware Mail Signature stood out due to it’s simple integration and set up. The team found it highly affordable and flexible and loved the ease with which they could now centrally manage all signatures.

Opaheke School was struggling with inconsistent and unprofessional signatures on their outgoing emails. It was difficult to create and maintain individual signatures for each busy staff member. Crossware Mail Signature for Office 365 provided the perfect solution for achieving professional, consistent signatures for everyone.

Moa Brewing Company initially tried out Crossware Mail Signature as they searched for an alternative to the disappointing option that they were testing at the time. Moa needed a way to change signatures according to branch and to get it working on every device and platform. They wanted to take pressure off individual users and take control of branding.

Customer Stories

Rated 4.5/5 by 434+ customers

Peter C IT Head, Partnership Member in UK Legal Services, 51-200 Employees

“We are a business with lots of specialist individual teams, Crossware enables us to have custom headers, footers, campaigns, signatures and disclaimers for all those teams.”

Matthew S. Systems Analyst in US Transportation, 1,001-5,000 Employees

“Great Product!! Flexible with signatures. It’s flexible and reliable and does what we need it to. We’ve used it for applying multiple signatures to different groups.”

Ray B. Office 365 Administrator in US Food & Beverages, 5,001-10,000 Employees

“We’ve used this product both for IBM Notes/Domino as well as Outlook/Office 365. We love it! The Support Staff is second to none! I highly recommend this product to everyone.”