Mailrith

What Mailrith is

Mailrith is a hosted email marketing automation platform that does the marketing work and leaves the sending to a delivery service the customer chooses. Its homepage headline is "Grow Your List, Not Your Email Marketing Bill", and the idea behind it is simple: Mailrith provides the workspace, landing pages, forms, broadcasts, sequences, automations, tags, segments, custom fields, Magic Links, team access, AI writing and reports for a fixed plan price, and the delivery service you connect sends each message and bills you separately for it. The site says Mailrith does not charge more just because your subscriber list grows, and that every public paid plan includes unlimited subscribers.

The problem it sets out to solve is list-based pricing. The homepage points out that a giveaway or a good lead magnet can add subscribers quickly, and a subscriber-priced tool raises the bill before those new people have bought anything. Mailrith moves that cost to the sending side, where you pay the delivery service for the email you actually send.

Because Mailrith is hosted, customers do not maintain servers, databases, backups or product updates. The site names the people it writes for in a long list of use-case pages: coaches, course creators, bloggers, newsletter creators, authors, podcasters, YouTubers, small businesses, indie developers, real estate agents, event organizers, gyms, law firms, startups, SaaS companies, nonprofits and several kinds of agency.

Delivery connections

Mailrith connects to Amazon SES, Postmark, SendGrid, Mailgun, Resend, Brevo, or any service over Custom SMTP. Each connection is created with credentials from your own account at that service, tested with a test email, and then assigned to a workspace or a campaign. The homepage adds a point that matters over the life of an account: you can change the delivery service used for future emails without rebuilding your subscribers, forms, tags, sequences or automations.

The site is candid about what this model asks of you. Its list of "honest tradeoffs" says customers manage two accounts, complete an initial sender-domain setup, and remain subject to the delivery service's limits and rules, and that choosing a service does not guarantee inbox placement. Mailrith offers step-by-step guides that explain what to connect, what to check and what to fix before sending, and it says customers can contact the company for help choosing a service, connecting it, checking the sending domain and sending the first test email.

Amazon SES in detail

Mailrith has a full feature page on pairing with Amazon SES, and it shows how the model works in practice. The page's pitch is to use SES for sending and Mailrith for everything SES does not do: subscriber capture, newsletter writing, sequences, automations and reports, without self-hosting a newsletter app. It states plainly that Mailrith is not Amazon SES and does not replace SES sending limits, and that SES setup, account status, limits and costs stay in your own AWS account.

The setup it describes has five steps: verify your sending domain in SES and add the DNS records SES requires, move SES out of sandbox mode, create a Mailrith delivery connection with your SES SMTP credentials, send a test and assign the connection, then start with a clean, engaged segment and raise volume only after the early sends look healthy. Before a real launch it advises setting up SPF, DKIM and DMARC for the sending domain, deciding how bounces and complaints flow back so bad addresses stop receiving mail, and checking your SES region, daily quota and send rate.

For costs, the page gives an estimate of what SES itself may charge, based on its base outbound rate of $0.10 per 1,000 emails, and says the estimate excludes Mailrith's own subscription. Your total is therefore the Mailrith plan plus the delivery service's charges, and the page says the split keeps the sending bill from being hidden inside subscriber tiers.

Campaigns, sequences and automations

Mailrith separates three kinds of sending. Broadcasts are one-time emails: you write, select subscribers, test, schedule, send and review. Sequences send planned emails over time and are aimed at welcome series, onboarding and educational follow-up; the SES page calls them "timed lessons". Automations handle subscriber follow-up with triggers, waits, rules, emails, tags and sequences, built visually. Reusable email templates sit alongside all three.

Write With AI helps draft broadcasts, sequence emails, sequence plans and automation ideas, and the site says the user reviews and edits each draft before anything goes live. A separate AI Agents feature connects Mailrith to ChatGPT, Codex, Claude and other AI clients through OAuth, MCP and scoped tools.

Subscribers, forms and landing pages

Subscriber data is organized with tags, custom fields and segments. Tags group people by source, interest, stage, behavior and sending rules. Custom fields store subscriber details for personalization, segments, forms, imports and automation rules. Segments are reusable groups built from tags, custom fields, status, forms, sequences and activity rules.

Forms collect subscriber details, assign tags and embed on your website. Landing Pages build hosted signup pages with forms, page sections, success pages and reporting. Magic Links turn a subscriber's click into an action such as tagging, enrolling in a sequence or a simple preference update. Workspaces keep brands, clients or projects apart, each with its own subscribers, emails, forms, automations, delivery connections and team access, and Team Management lets you invite teammates, assign workspace access and manage permissions without sharing passwords.

Reports cover campaign activity, and the SES workflow asks you to review bounces, complaints, unsubscribes and campaign activity before each next send.

For developers

Mailrith lists a public API, official SDKs and an official MCP server among its features, with developer documentation in its own section. The site also publishes free email tools for validation and authentication, including an email domain health checker, and a set of plain-language guides to planning, writing, testing and sending email.

Plans and pricing

Pricing is on a separate pricing page that the homepage's Get Started button links to, and the homepage includes a cost calculator that adds an example SES sending estimate to the current Mailrith plan. The fixed points the site states are that every public paid plan includes unlimited subscribers and that the plan price does not rise only because your list grows.

Moving in

Mailrith's comparison pages include a migration checklist: export your lists with consent, fields, tags, unsubscribes, bounces and suppressions; recreate forms, landing pages, templates, sequences and triggers; choose or reuse a delivery service; and test the connection, delivery events, signup paths and a small engaged segment before switching regular sends.

Who it suits

Mailrith fits senders whose list is growing faster than their revenue, and people who already have, or are willing to set up, an account with a delivery service. Creators, SaaS teams and agencies with several brands get the most from the fixed platform price, the workspaces and the choice of delivery service. The site itself says another tool may fit better if you want sender setup hidden and one bill for marketing and sending, if you are not ready to verify domains and add DNS records, or if you want a managed deliverability team to make sending decisions for you.