Sold by: kCloudHubs LLC
Deployed on AWS
AWS Free Tier
This product has charges associated with it for seller support. SMTP Server is a software service that uses the Simple Mail Transfer Protocol (SMTP) to send and relay email messages between email clients, applications, and mail servers.
Overview
SMTP Server on Ubuntu 26.04 with Free Maintenance Support by kCloud
SMTP Server on Ubuntu 26.04 is an open-source email communication solution available through AWS Marketplace. This offering includes free maintenance support from kCloud, with optional paid support services for organizations requiring additional deployment guidance, troubleshooting, and operational assistance.
SMTP (Simple Mail Transfer Protocol) is a standard protocol for sending and relaying email messages between applications, email clients, and mail servers. This solution uses Postfix, a widely adopted open-source mail transfer agent that provides email transmission, message queue management, and configurable mail routing.
Built on Ubuntu 26.04, this solution provides a flexible foundation for automated email delivery, application notifications, system alerts, and cloud-based communication workflows.
Key Features
- SMTP-based email transmission and message relay.
- Postfix mail transfer functionality.
- Automated email notifications for applications and services.
- Configurable hostnames, mail domains, and message routing.
- Message queue management and delivery troubleshooting.
- Integration with websites, scripts, and business applications.
- TLS encryption and SMTP authentication when configured.
- Integration with external SMTP relay providers.
Technical Highlights
- Postfix SMTP server software.
- Ubuntu 26.04 operating system.
- Standard SMTP protocol support.
- Configurable mail delivery and queue handling.
- Service management and diagnostic tools.
- Flexible configuration for local delivery and external email relays.
AWS Marketplace Deployment
Designed for deployment on Amazon EC2, this solution provides a cloud-based environment for configuring and operating SMTP services.
- Deployment on supported Amazon EC2 instances.
- Integration with cloud-hosted applications and services.
- Suitable for development, testing, and production workloads.
- Flexible configuration based on email delivery requirements.
Use Cases
- Application-generated email notifications.
- Automated system alerts and monitoring messages.
- Password reset and account verification emails.
- Transactional emails from websites and applications.
- Scheduled reports and business notifications.
- Outgoing email relay for cloud-hosted services.
- Email delivery testing and development environments.
Benefits
- Simplify automated email delivery from applications.
- Use an established open-source mail transfer agent.
- Manage outgoing messages through configurable queues.
- Integrate email services with existing cloud infrastructure.
- Support secure email transmission with appropriate encryption and authentication.
- Adapt the deployment to different business and application requirements.
Maintenance Support
Free maintenance support from kCloud provides assistance with supported deployment-related issues. Optional paid support services may be available for additional troubleshooting, configuration guidance, and operational assistance.
Security and Configuration
A secure deployment requires appropriate relay restrictions, authentication, encryption, firewall rules, and mail routing configuration. Public email delivery may also require a domain, SPF, DKIM, DMARC, and reverse DNS records. Cloud provider restrictions on SMTP ports may apply.
Why Choose This Solution?
SMTP Server on Ubuntu 26.04 combines Postfix email transfer capabilities with a cloud-ready operating environment. Backed by kCloud maintenance support, it provides a flexible foundation for application messaging, automated notifications, and SMTP relay workloads on AWS. Configure the solution according to your email delivery requirements while benefiting from an established open-source technology stack.
Highlights
- Reliable SMTP-based email transmission</strong> and message relay.
- Postfix-based mail transfer functionality.
Details
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Delivery method
Delivery option
64-bit (x86) Amazon Machine Image (AMI)
Latest version
Operating system
Ubuntu 26.04
Deployed on AWS
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Features and programs
Financing for AWS Marketplace purchases
AWS Marketplace now accepts line of credit payments through the PNC Vendor Finance program. This program is available to select AWS customers in the US, excluding NV, NC, ND, TN, & VT.
Pricing
Pricing is based on actual usage, with charges varying according to how much you consume. Subscriptions have no end date and may be canceled any time.
Additional AWS infrastructure costs may apply. Use the AWS Pricing Calculator to estimate your infrastructure costs.
If you are an AWS Free Tier customer with a free plan, you are eligible to subscribe to this offer. You can use free credits to cover the cost of eligible AWS infrastructure. See AWS Free Tier for more details. If you created an AWS account before July 15th, 2025, and qualify for the Legacy AWS Free Tier, Amazon EC2 charges for Micro instances are free for up to 750 hours per month. See Legacy AWS Free Tier for more details.
Dimension | Cost/hour |
|---|---|
m4.large Recommended | $0.006 |
t2.micro | $0.001 |
t3.micro | $0.006 |
m3.medium | $0.006 |
m3.large | $0.006 |
m5.large | $0.006 |
t2.small | $0.006 |
t2.medium | $0.006 |
t2.large | $0.006 |
t2.xlarge | $0.006 |
Vendor refund policy
No refund
Legal
Vendor terms and conditions
Upon subscribing to this product, you must acknowledge and agree to the terms and conditions outlined in the vendor's End User License Agreement (EULA) .
Content disclaimer
Vendors are responsible for their product descriptions and other product content. AWS does not warrant that vendors' product descriptions or other product content are accurate, complete, reliable, current, or error-free.
Delivery details
64-bit (x86) Amazon Machine Image (AMI)
Amazon Machine Image (AMI)
An AMI is a virtual image that provides the information required to launch an instance. Amazon EC2 (Elastic Compute Cloud) instances are virtual servers on which you can run your applications and workloads, offering varying combinations of CPU, memory, storage, and networking resources. You can launch as many instances from as many different AMIs as you need.
Version release notes
Packaged with latest updates as of Nov/2026
Additional details
Usage instructions
Connect your instance via SSH, the username is ubuntu. More info on SSH: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AccessingInstancesLinux.html - Run the following commands: #sudo su #sudo postfix check #sudo systemctl restart postfix #postconf mail_version #apt-cache policy postfix
Support
Vendor support
Feel free to reach out anytime. Our support team is available 24x7 for assistance mail: meha@kcloudhubs.com
AWS infrastructure support
AWS Support is a one-on-one, fast-response support channel that is staffed 24x7x365 with experienced and technical support engineers. The service helps customers of all sizes and technical abilities to successfully utilize the products and features provided by Amazon Web Services.
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