What is STACKIT MailOut?
STACKIT MailOut is an email delivery service that can be used exclusively for the automated, outbound delivery of emails. Typical uses are transactional messages such as registrations, login notifications, and order confirmations, as well as marketing and campaign emails.
According to the official documentation, the service is in beta. Plan production use accordingly, taking the documented feature set and possible changes during the beta into account.
MailOut is a pure sending service: incoming email, replies, and bidirectional communication are not supported, and no mailboxes or email accounts are provided. You use your own domains as sending domains.
Core Features
- Scalable delivery: Highly available infrastructure with high-reputation IP pools for large email volumes
- Your own sending domains: Use existing domains without provisioning mailboxes
- Authentication: Compliance with SPF, DKIM, and DMARC
- Transport security: Support for MTA-STS, DANE, and DNSSEC
- Bounce handling: Automated processing of hard and soft bounces as well as spam reports
- Suppression list: Customer-managed, per sending domain
- Message scanning: Spam and malware scanning for all messages
- Dedicated IP: Optionally available for delivery
Typical Use Cases
Transactional email: Registration confirmations, login notifications, and order confirmations are sent directly from the application.
Marketing and campaign sending: Newsletters and campaigns are delivered over infrastructure built for high volumes.
Protecting deliverability: SPF, DKIM, and DMARC together with automated bounce handling and suppression lists keep the sending domain reputation stable.
Sovereign delivery: Email sending stays within the STACKIT cloud instead of relying on non-European providers.
Benefits
- Clearly scoped service: Focused on outbound, automated delivery without mailbox administration
- Standards out of the box: SPF, DKIM, DMARC, MTA-STS, DANE, and DNSSEC are supported
- Less operational effort: No need to run your own mail transfer agent or build IP reputation
- Control over recipient lists: Suppression list per sending domain stays with the customer
Integration with innFactory
As an official STACKIT partner, innFactory supports you with MailOut: setting up sending domains including SPF, DKIM, and DMARC records, connecting your applications through the API, designing bounce and suppression handling, and assessing what the beta status means for your use case.
Typical Use Cases
Technical Specifications
Frequently Asked Questions
What is STACKIT MailOut?
STACKIT MailOut is an email delivery service that can be used exclusively for the automated, outbound delivery of emails. The service is currently in beta.
Can I receive email with MailOut?
No. MailOut is designed for one-way, automated sending. Incoming email, replies, and bidirectional communication are not supported, and no mailboxes or email accounts are provided.
Which authentication standards are supported?
MailOut complies with the common email authentication standards SPF, DKIM, and DMARC. MTA-STS, DANE, and DNSSEC are supported as well.
How are undeliverable emails handled?
Emails that cannot be delivered (hard and soft bounces) and spam reports are handled automatically. A customer-managed suppression list is available per sending domain.
Can I use a dedicated IP address?
By default, delivery uses high-reputation IP pools. An optional dedicated IP address can be used for delivery.
Is MailOut production-ready?
The documentation labels MailOut as a beta product. Before using it in production, review the current feature set and the terms of the beta phase in the official documentation.
Note: All product information on this page has been compiled with care, but is provided without guarantee and may be outdated or incomplete. Cloud services evolve rapidly — features, pricing, SLAs, and availability change frequently. Authoritative and up-to-date information can only be found on the official product page of STACKIT (official documentation). This page does not represent an offer by STACKIT.
