# Mailer To Go review (2026): is it worth $15 a month? > Managed SMTP sending for developers and Heroku apps Checked Nov 13, 2026 ยท graded Nov 13, 2026 by ToolGPA. Mailer To Go is a transactional email service for developers that sends over SMTP, with webhooks for delivery events and inbound routing. A REST API is listed as in development. It is also sold as an add-on on Heroku, Addons.io and Build.io. - **Category:** Email Sending Services - **Made by:** Sidebored.io, Inc. - **Website:** https://www.mailertogo.com - **Runs on:** Web - **Who should skip it:** Not for you if you want a free plan, as there isn't one. - **Facts last checked:** Nov 13, 2026 ## Pricing As of Nov 13, 2026, Mailer To Go is a paid product, starting at $15 per month for 25,000 emails. - **Pricing model:** Paid - **Free plan:** None. - **Free trial:** None listed. | Plan | Price | What you get | | --- | --- | --- | | Starter | $15 per month for up to 25,000 emails, billed monthly | 5 sending domains, 30 days of event history, email support. Extra email is $1.00 per 1,000. | | Growth | $50 per month for up to 250,000 emails, billed monthly | 25 sending domains, 90 days of event history, priority support. Extra email is $0.60 per 1,000. | | Scale | $150 per month for up to 1,000,000 emails, billed monthly | Unlimited sending domains, 12 months of event history, priority support. Extra email is $0.40 per 1,000. | Read from https://www.mailertogo.com/plans on Nov 13, 2026. Prices change, so confirm with Mailer To Go before buying. ## Ways to pay less - **20% off with annual billing** (Annual discount): The plans page says annual billing saves 20% on the direct plans. Source: https://www.mailertogo.com/plans ## Key features - **SMTP sending:** Standard SMTP on port 587 (STARTTLS) or 465 (SSL), so framework mailers work by pointing them at the dashboard credentials. - **Delegated DNS:** Publish one NS record and the service publishes and rotates SPF, DKIM and DMARC records for a dedicated sending subdomain. - **Suppression handling:** Hard bounces and spam complaints are added to a suppression list automatically. - **Delivery webhooks:** Webhook URLs receive delivered, bounced, opened and clicked events. - **Inbound routing:** Inbound mail can be forwarded by rule or delivered to an app as a webhook. - **Marketplace add-ons:** Available as an add-on on Heroku, Addons.io and Build.io, which sets SMTP credentials as config variables. ## Good for - Developers on Heroku who want a managed sender as an add-on - Apps whose mailer already speaks SMTP - Teams that want volume-based pricing without per-contact fees ## Worth knowing - There is no free plan; every plan is paid. - The pages say a REST API is in development, so sending today is over SMTP. - A dedicated IP is a $30 per month add-on on Growth and Scale, on request. - Plans bought through Heroku, Addons.io or Build.io are billed there and priced separately from the direct plans. ## ToolGPA grades **GPA: 1.8 out of 4**, graded Nov 13, 2026. Mailer To Go sends transactional email over SMTP, from $15 a month for 25,000 emails. There is no free plan, and the REST API is still listed as in development. - **Value for money: C.** Starter is $15 a month for 25,000 emails, the middle of this category's prices. Extra email is $1.00 per 1,000, and a dedicated IP is $30 a month. - **Free plan and trial: F.** Nothing free: there is no free plan or trial, so every plan is paid from day one. - **Features: C.** SMTP sending, delegated DNS, suppression handling, delivery webhooks and inbound routing. The REST API is still in development, so sending today is SMTP only. - **Ease of use: C.** No store rating on record. It takes sending domains and DNS to set up, but it is a plain SMTP service. - **Platforms and integrations: B.** Web, SMTP, and Heroku, Addons.io and Build.io add-ons, plus Rails, Django, Laravel and Nodemailer guides. No apps. These are ToolGPA's own grades. Graded from this listing, whose facts were read from Mailer To Go's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. ## Where it stands among email sending services - Mailer To Go's GPA of 1.8 is higher than 4 of the 50 other email sending services we grade, and level with 4. - It stands best on platforms and integrations (B, above 17 of 50) and worst on free plan and trial (F, above 0). - Its paid plans start at $15 a month, against a middle price of $15 for the category: 19 of the 41 others that charge start lower. - On features, ease of use and platforms it scores 2.3 out of 4. 7 tools score higher and cost less. The category's chart of price against score: https://toolgpa.com/charts/email-sending ## Keep it, or make your own? **Keep it.** To replace Mailer To Go you would be making mail servers with a good name among inbox providers. That is not a weekend's work, with an AI app builder or without one. That makes this kind of software worth paying for, not this one in particular: 42 of the 50 other email sending services grade higher. It costs $180 a year. - You could not: Mail servers with a good name among inbox providers. - You could not: It plugs into other products, Heroku, Addons.io and Build.io among them, and has an API. A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it. ## Works with Heroku, Addons.io, Build.io, Rails, Django, Laravel, Nodemailer **Tags:** Transactional email, Public API ## Alternatives - [Mailgun](https://toolgpa.com/tools/mailgun): Email API and SMTP relay for developers, with list validation. [Compare](https://toolgpa.com/compare/mailer-to-go-vs-mailgun) - [Twilio SendGrid](https://toolgpa.com/tools/sendgrid): Twilio's email API and SMTP service, priced by monthly email volume. [Compare](https://toolgpa.com/compare/mailer-to-go-vs-sendgrid) - [Postmark](https://toolgpa.com/tools/postmark): Transactional email API and SMTP, with broadcasts on a separate stream. [Compare](https://toolgpa.com/compare/mailer-to-go-vs-postmark) - [Amazon SES](https://toolgpa.com/tools/amazon-ses): AWS email sending and receiving, paid per 1,000 emails. [Compare](https://toolgpa.com/compare/amazon-ses-vs-mailer-to-go) - [SMTP2GO](https://toolgpa.com/tools/smtp2go): SMTP relay and email API priced by emails a month, with a free plan. [Compare](https://toolgpa.com/compare/mailer-to-go-vs-smtp2go) ## Sources The prices, plans, platforms and features above were read from these pages on Nov 13, 2026: - https://www.mailertogo.com/plans - https://www.mailertogo.com - https://www.mailertogo.com/features - https://www.mailertogo.com/about Page: https://toolgpa.com/tools/mailer-to-go Listed by ToolGPA (toolgpa.com).