Lumail vs SMTP2GO: Which Email Platform Fits How You Work?

SMTP2GO is an email delivery service: an SMTP relay and REST API for sending transactional and bulk email from apps, websites, and office tools, with reporting and phone support. Lumail is an email platform: newsletters, subscribers, graph workflows, and transactional email in one organization that AI agents can operate.

SMTP2GO does not store a subscriber list or run automations, and its own support team points list senders to separate mailing-list software. So the question is whether you need only a dependable sending pipe, or a place where the newsletter and lifecycle email live too. SMTP2GO facts in this comparison come from its official pricing page as of August 2026. For the compact version, see the side-by-side comparison table.

Lumail vs SMTP2GO at a glance

ChatGPT plugin

Lumail's current plans are on the Lumail pricing page.

Choose Lumail if AI agents should operate your email

SMTP2GO has a practical developer surface: a REST API, SMTP, official libraries for most major languages, a WordPress plugin, and a remote MCP server. That MCP server lets an assistant browse the API documentation and run API requests with your key, and there is also an agent skill for sending email. There is no ChatGPT app. Since SMTP2GO holds no subscribers, campaigns, or workflows, an agent can send mail through it but has nothing else to manage.

Lumail exposes 89 organization-scoped MCP tools covering campaigns, subscribers, tags, segments, workflows, templates, analytics, and transactional sending. They work in ChatGPT, Claude, Claude Code, and Cursor, alongside a CLI, a TypeScript SDK, and a REST API. Every tool is scoped to your organization, so an agent works with your real audience and real campaign state.

In practice, you can ask an assistant to:

• draft this month's newsletter from notes and your approved template;
• segment subscribers by tag or engagement before a targeted send;
• build a welcome workflow and explain each branch;
• send a transactional test and check its delivery;
• summarize campaign results without exporting a spreadsheet.

Sending and scheduling stay behind human approval. The difference is that email stops being split between a sending service and a separate list tool, and becomes one system your team and your agents operate together.

Choose SMTP2GO if you only need a dependable sending pipe

SMTP2GO has been running since 2006 and is built for people who just need email to go out. It works with apps, websites, and office tools like Outlook, sets up SPF and DKIM automatically, and routes mail through servers around the world. Paid plans come with phone, live chat, and ticket support, a 100% delivery SLA, and a 30-day money-back guarantee.

It also offers things Lumail does not. The Professional plan, from $75/month for 100,000 emails, includes a dedicated IP, with extra IPs at $19/month. It supports subaccounts for agencies, optional SMS, and email archiving. Lumail does not sell dedicated IPs or offer inbound email routing; SMTP2GO is focused on outbound delivery as well.

Choose SMTP2GO if:

• you only need SMTP or API delivery, and your lists live somewhere else;
• you want phone support and a delivery SLA from a small, focused provider;
• you need dedicated IPs, subaccounts for clients, SMS, or email archiving.

Compare the pricing models, not the starting prices

Both products charge by sending volume, not by subscriber, so the comparison comes down to included volume and the cost of extra email.

SMTP2GO's free plan includes 1,000 emails a month, capped at 200 a day, and stops sending at the limit. Paid plans start at $15/month for 10,000 emails, with extra email at $1.20 per 1,000. The 50,000-email tier is $30/month, and Professional is $75/month for 100,000 emails, with extra email at $0.85 per 1,000. Overage applies automatically up to three times your plan's allowance. Paying yearly gets two months free.

Lumail prices on emails sent, with unlimited subscriber storage on every plan:

• Free: 3,000 emails per month, no credit card;
• Premium: $20/month with 40,000 emails included, then $0.60 per 1,000;
• Business: $200/month with 400,000 emails included, then $0.40 per 1,000.

A worked example

Say you run a product with 25,000 subscribers. You send a weekly newsletter (100,000 emails) plus 5,000 transactional emails, so 105,000 emails a month.

On SMTP2GO Professional, that is $75 for 100,000 emails plus 5,000 × $0.85 per 1,000, so $79.25 a month, and you still need separate software for the list and the newsletter.

On Lumail Premium, it is $20 for the first 40,000 emails plus 65,000 × $0.60 per 1,000, so $59 a month, with the editor, subscriber database, and workflows included.

At very small volume, SMTP2GO can win: a 10,000-email month is $15 there versus $20 on Lumail. Run your normal month and your busiest month through both pricing pages.

Compare automation and transactional email

SMTP2GO has no workflow builder, segments, or subscriber database. You can schedule batch sends through the API, use templates, and receive webhooks for opens, clicks, and bounces, but sequences live in your application or in a separate tool. SMTP2GO's own support recommends Customer.io for automated emails and A/B testing.

Lumail's workflow engine is graph-based and included on every plan: subscriber, tag, event, schedule, and manual triggers; email, wait, action, and webhook steps; condition and weighted branches; goals and exit rules. The same workflows are readable from the app, MCP tools, CLI, SDK, and API.

Transactional email is SMTP2GO's core product, and its SMTP relay supports a wide range of ports for networks that block the usual ones. Lumail sends transactional email through its REST API or SMTP relay at smtp.lumail.io:587 with STARTTLS, in the same organization as your newsletters. One domain setup, one subscriber database, one place to debug delivery.

Migrating from SMTP2GO to Lumail

SMTP2GO does not hold your main list, so the move starts wherever your list lives today.

1. Export recipients and suppressions. Export your list from your app or mailing-list tool, and pull SMTP2GO's suppressions so past bounces and unsubscribes carry over.
2. Authenticate your sending domain. Set up SPF and DKIM in Lumail and verify the domain. Keep SMTP2GO live while DNS propagates.
3. Rebuild one sequence as a workflow. Recreate your welcome or onboarding logic as a graph, then test with a few subscribers.
4. Switch your SMTP settings. Point apps and tools from SMTP2GO's server to smtp.lumail.io:587, or keep SMTP2GO for app email and move only the newsletter.
5. Send one campaign and connect your agents. Send to a consented segment, check rendering and unsubscribe links, then run one real task through MCP.

Frequently asked questions

Is Lumail an SMTP2GO alternative?

Yes, if you want campaigns, graph workflows, subscribers, and transactional email in one organization agents can operate. If you only need a sending pipe with phone support, SMTP2GO is the better fit.

Is Lumail cheaper than SMTP2GO?

Often, past 10,000 emails a month. At 105,000 emails, SMTP2GO Professional is $79.25 and Lumail Premium is $59. Lumail's free plan is 3,000 emails a month; SMTP2GO's is 1,000.

What is the main difference between Lumail and SMTP2GO?

SMTP2GO is a sending service for apps and teams that keep their lists elsewhere. Lumail is the email platform, with a visual editor, graph workflows, subscribers, and 89 MCP tools.

Can I migrate from SMTP2GO to Lumail?

Yes. Export recipients and suppressions, authenticate your domain, rebuild sequences as workflows, and point SMTP settings at Lumail. Many teams keep SMTP2GO for product email.

Which one should you choose?

Choose SMTP2GO if you need email delivered from apps, websites, or office tools, want a human on the phone when something breaks, and already keep your lists and automations in another tool.

Choose Lumail if you want the list, the newsletter, the workflows, and the transactional email in one place, with a lower price per extra email and 89 MCP tools your agents can use today.

You can start Lumail free with 3,000 emails per month and no credit card, review the pricing plans, or browse the full comparison hub. Comparing more than two tools? See the best SMTP2GO alternatives.