SMTP Relay and Email API

Quick answer: SMTP Relay and Email API is boost email delivery and engagement with Maileroo. Enjoy advanced analytics, dedicated IPs, and seamless integration for fast and reliable email campaigns.

Listed 2026-08-28 · Request removal

Definition: Maileroo is an email delivery platform that provides an SMTP relay and RESTful Email API for sending transactional messages and marketing email. It is designed for teams that need an application-friendly way to send messages, monitor delivery activity, verify addresses, and process incoming email through routing and webhooks.

What is Maileroo used for?

Maileroo supports several common email operations from one delivery platform. Developers can connect an application through SMTP or the Email API to send messages such as account confirmations, password resets, receipts, alerts, and other transactional notifications. Marketing and e-commerce teams can also use Maileroo for campaigns and newsletter delivery.

The product is positioned for organizations that need more than a mailbox or standard email client. Rather than composing and sending individual messages manually, a team can use Maileroo as part of an application, website, customer communication workflow, or campaign process. SMTP compatibility can be useful for software that already supports an SMTP server, while the RESTful API gives developers an alternative integration method.

• Transactional email, including notifications and account-related messages
• Marketing campaigns and newsletter sending
• Email address verification through an API
• Inbound email handling and routing
• Application integrations using SMTP, REST APIs, and webhooks

How can teams send email through Maileroo?

Maileroo offers two primary outbound delivery methods: SMTP relay and a RESTful Email API. The SMTP relay is relevant for existing email clients and applications that can send through SMTP. Instead of building a custom API connection, a team can configure its sending software to use Maileroo as the relay service.

The Email API is intended for programmatic sending. A developer can integrate Maileroo into an application workflow and trigger messages when events occur, such as a new user registration, a completed purchase, or an account update. This approach can be suitable when email needs to be connected closely to application logic.

Maileroo also lists templates and attachments among its features. Templates can help teams create reusable message structures, while attachment support is relevant when a workflow needs to send files alongside an email. The appropriate sending method depends on the existing technical setup: SMTP may be the simpler path for compatible systems, while an API connection may suit custom products and developer-led implementations.

What delivery and analytics capabilities does Maileroo include?

Maileroo includes email analytics, giving users a way to review delivery-related activity after messages are sent. This can help marketers, developers, and operations teams assess how their sending workflows are performing and identify areas that may require attention. The available facts describe analytics as an advanced capability, but teams should review Maileroo documentation for the exact reports, events, retention, and metrics available for their selected plan.

Dedicated IP service is also available. A dedicated IP can be relevant for senders who need a separate sending IP rather than using shared infrastructure. Maileroo lists its dedicated IP service at $50 per month. Whether that option is necessary depends on sending volume, email type, operational requirements, and the organization’s broader deliverability approach.

Maileroo describes its infrastructure as scalable, which may make it applicable to startups beginning with smaller volumes as well as businesses that expect their email traffic to grow. Deliverability is not determined by an email platform alone, however. Sender practices, recipient list quality, content, authentication configuration, and complaint handling can all affect email outcomes.

Can Maileroo verify addresses and handle inbound email?

Yes. Maileroo includes an email verification API and inbound email routing. The verification capability can be used in workflows where a business wants to check email addresses before or alongside sending activity. This may be useful for sign-up flows, contact data processes, or systems that need to evaluate address quality through an API-based process.

Inbound routing extends Maileroo beyond outbound delivery. Organizations can use it when they need to receive email and direct it into an application or workflow. Webhooks are included among the product features and integrations, providing a way for connected systems to react to email-related events or routing activity.

For example, a product team may send transactional messages through Maileroo while also configuring inbound handling for replies or other received mail. The exact routing design and webhook behavior should be validated in Maileroo’s documentation before implementation, particularly for workflows involving customer requests, automated processing, or sensitive information.

Who is Maileroo a fit for?

Maileroo is aimed at developers, marketers, startups, businesses, e-commerce teams, and other organizations that require an email delivery service rather than a consumer mailbox. Its mix of SMTP, API access, analytics, templates, verification, webhooks, and inbound routing can be relevant to teams with both technical and campaign-related email needs.

Developers may value the RESTful Email API and SMTP relay options because they can select an integration approach that matches an existing application. Marketers may focus more on campaign sending, newsletters, templates, and analytics. E-commerce teams can use the same platform for order communications, customer notifications, and marketing activity, subject to their own sending policies and technical configuration.

Maileroo may also be worth considering for organizations comparing services such as Amazon SES, SendGrid, Postmark, or Elastic Email. A useful comparison should look beyond a headline sending allowance. Teams should assess required API functions, SMTP compatibility, inbound email requirements, verification features, reporting needs, dedicated IP availability, expected volume, and the pricing terms that apply to their account.

What does Maileroo cost?

Maileroo has a free plan that includes up to 3,000 emails per month. Its listed paid options include 25,000 emails per month for $10 per month and 100,000 emails per month for $30 per month. The listed dedicated IP service costs $50 per month.

Pricing and plan information can vary across Maileroo pages, so prospective users should confirm current allowances, eligibility, included features, and any applicable limits directly with Maileroo before choosing a plan. This is especially important for teams expecting larger volumes or evaluating whether a dedicated IP is needed.

What limitations should teams consider before using Maileroo?

Maileroo’s available pricing and plan details are not fully uniform across all referenced pages, so users should verify the current terms before relying on a specific allowance or feature combination. Higher-volume senders may also need a paid dedicated IP service, which adds to the monthly cost beyond a sending plan.

As with any SMTP relay or Email API provider, implementation work is still required. Teams need to configure their application or email client, choose between SMTP and API-based delivery, and determine whether webhooks, verification, inbound routing, templates, or attachments are required. Businesses should also evaluate documentation, integration testing, deliverability processes, and operational support needs in relation to their particular workflow.

FAQ

What is Maileroo?

Maileroo is an email delivery platform with SMTP relay and a RESTful Email API for transactional and marketing email.

Does Maileroo have a free plan?

Yes. Maileroo lists a free plan with up to 3,000 emails per month.

Can Maileroo send transactional emails?

Yes. Maileroo can be used for transactional messages, including application notifications and other automated email.

Does Maileroo support inbound email?

Yes. Maileroo includes inbound email routing and webhooks for connected workflows.

What is an SMTP relay service?

An SMTP relay service sends email on behalf of an application or email client. Maileroo provides an SMTP relay alongside its API-based sending option.

What is an email API used for?

An email API lets software trigger and manage email programmatically. Maileroo provides a RESTful Email API for application-based sending.

How do email delivery platforms help businesses?

Email delivery platforms provide infrastructure for transactional and marketing messages, often with integrations and reporting. Maileroo combines SMTP, API access, analytics, verification, and inbound routing features.