DUO
Bulk email and SMS that get delivered. And proof that they were.
DUO is Sooma's communications platform for newsletters, campaigns and automated sending from your applications. It protects your domain's reputation and records the delivery and reading of every message.
- SMTP relay and API for your applications
- Proof of sending, delivery and reading
- Servers in the European Union
Chosen by
“Messages are now actually delivered and traceable, which gives users and departments confidence.”
The problem
“DUO's main advantage is the security and guaranteed delivery of bulk messages. It protects the reputation of the Council's domain, which used to land us on blacklists and get us blocked internationally, affecting the everyday email of every user and department.”
What changed
“We felt every difference: reliable delivery, less in-house infrastructure to manage and traceable sending. Above all, messages are actually delivered and traceable.”
Would you recommend it?
“Yes, above all for the autonomy, security and assurance in bulk email sending. Application integration is also a big advantage, because it lets us send securely from our various applications, and the functional support helps solve any issue.”
What DUO does
Bulk sending without putting your domain at risk.
Newsletters, campaigns, notifications and messages from your applications, on a single platform.
Domain reputation protected
Bulk mail goes out through DUO's infrastructure, separate from your everyday email, with SPF, DKIM and DMARC configured. Your domain's reputation stays protected.
Every send traceable
A record of sending, delivery, opens and clicks for every message, timestamped to the second. You always know what arrived and to whom.
Integration with your applications
Use DUO as an SMTP relay or through its REST API and webhooks, to send securely from your ERP, CRM or internal applications.
Newsletters and campaigns
Drag-and-drop editor with professional templates, segmentation, automations and landing pages, with real-time reports.
SMS
SMS sending with your organisation's name as the sender, on the same platform.
Legal value when you need it
With DUO Registered, every send has a qualified eIDAS certificate: the digital equivalent of registered mail with acknowledgement of receipt, under Portuguese Decree-Law 12/2021.
Three tiers
Choose the level of proof you need.
All of them include email and SMS on the same platform. The details and prices of each tier are on the DUO website.
DUO Proven
Emails that reach the inbox, with proof of sending, delivery and reading. Editor, automations, landing pages and API.
DUO Verified
Everything in Proven, plus your organisation's logo and the verified tick in the inbox (BIMI). No one can impersonate you.
DUO Registered
Everything in Verified, plus the digital equivalent of registered mail with acknowledgement of receipt, with a qualified eIDAS certificate and a legally valid archive.
Examples
Newsletters sent with DUO.
Some of the messages our customers send through DUO.
AD&C
Apifarma
Coliseu de Lisboa
Lisbon City Council
Security
Certified security, data in Europe.
- Keys stored in a Thales Luna HSM (FIPS 140-2 Level 3)
- Qualified eIDAS certificates, with Asseco and Multicert
- Servers in the European Union, GDPR compliant
- Automatic handling of unsubscribe requests and bounces
Frequently asked questions
DUO
What people usually ask us before they start.
What is DUO?
It is Sooma's email and SMS platform for bulk and automated sending: newsletters, campaigns, notifications and messages from your applications, with proof of every send.
Can I use DUO from my own applications?
Yes. DUO works as an SMTP relay and has a REST API and webhooks, so you can send from your ERP, CRM or internal applications.
Why not send newsletters through your usual email server?
Bulk sending from your usual server can get your domain blacklisted and block your everyday email as well. With DUO, bulk mail goes out through infrastructure built for it.
Where is the data kept?
On servers in the European Union, subject to the GDPR.
Where can I see the prices?
On the DUO website, duo.pt, with the details of each tier. We can also prepare a tailored quote.