SMTP Relay

A Scalable SMTP Relay for Applications and Business Email

Route legitimate outbound email through SMTP infrastructure designed for transactional and marketing workflows.

Start Free — 1,000 Emails View Pricing

Built for This Email Workflow

Use SMTP infrastructure, authentication and monitoring appropriate to your sending requirements.

Standard SMTP

Connect software that supports standard SMTP without rebuilding your application.

Flexible Volumes

Plans currently range from smaller sending requirements through millions of monthly emails.

Domain Authentication

Configure SPF, DKIM and DMARC for authenticated sending domains.

Monitoring

Use available reporting to monitor delivery activity, bounces and engagement.

Bounce Handling

Process hard and soft bounces and maintain suppression controls.

Dedicated Options

Discuss dedicated IP or dedicated sending requirements for higher-volume workloads.

Common Use Cases

Web Applications

Route application-generated notifications and account messages.

CRMs & ERPs

Connect compatible business systems using SMTP.

Marketing Systems

Use SMTP with legitimate permission-based email workflows.

Deliverability matters: SMTP infrastructure can support a strong sending program, but inbox placement cannot be guaranteed. Authentication, sender reputation, recipient consent, list quality, content, engagement and receiving-provider decisions also affect delivery.

Frequently Asked Questions

What is an SMTP relay?

An SMTP relay accepts outbound email from an authorized application or system and transfers it toward recipient mail servers.

Can I use an existing application?

If your application supports standard SMTP, it can generally be configured with SMTP service credentials.

Do you offer high-volume SMTP?

SMTP-Plans currently lists plans up to 5 million monthly emails plus custom dedicated options.

Ready to Get Started?

Start with 1,000 emails at $0/month or choose a plan that matches your current sending volume.

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