Best SMTP2GO Alternatives in 2026: 7 Tools Compared

The best SMTP2GO alternatives are Lumail, Elastic Email, Mailgun, Amazon SES, Postmark, SendGrid, and Brevo, depending on whether you need a cheaper relay, the lowest possible rate per email, stricter transactional deliverability, or a relay that also stores your list and runs your campaigns. All of them accept mail over SMTP with a host, port, username, and password, so the switch is usually a settings change rather than a rewrite.

We make Lumail, so it is listed first; every other entry is judged on the same criteria with facts from each vendor's pricing page as of August 2026.

Why people look for an SMTP2GO alternative

SMTP2GO is a solid relay with phone support, many fallback ports, and regional endpoints. People still shop around for a few concrete reasons:

• The free plan is tight. Free is 1,000 emails a month and 200 a day, with a 25-per-hour cap until your sender domain is verified.
• Small overages cost more than the plan. Starter is $15 a month for 10,000 emails, then $1.20 per 1,000. Overage applies automatically up to 3× your plan, and unused emails do not roll over.
• It is only a pipe. There is no subscriber list, segment, or journey builder. SMTP2GO's own support recommends Customer.io or desktop mailing-list software if you need those.
• No inbound parsing. SMTP2GO documents outbound delivery; if you need to receive and parse replies, you need another provider.

SMTP2GO alternatives at a glance

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1. Lumail: best for an SMTP relay that also runs your list

Lumail gives you an SMTP relay at smtp.lumail.io:587 with STARTTLS and a REST API, inside the same organization as your subscribers, campaigns, and graph-based workflows. That matters for the exact gap SMTP2GO leaves: instead of pairing a relay with a separate mailing-list tool, the newsletter, the welcome sequence, and the password reset all come from one account with one suppression list. Agents can operate it through 89 organization-scoped MCP tools, a CLI, and a TypeScript SDK.

Pricing: Free is 3,000 emails a month, no credit card. Premium is $20 a month for 40,000 emails, then $0.60 per 1,000. Business is $200 a month for 400,000, then $0.40 per 1,000. Unlimited subscribers on every plan.

Choose it if:

• You currently pair SMTP2GO with a second tool for lists and newsletters
• You want workflows with triggers, waits, branches, and goals on every plan, including Free
• Your volume sits in SMTP2GO's lower tiers, where overage is $1.00 to $1.20 per 1,000 versus Lumail's $0.60

Watch out for:

• Lumail documents a single SMTP endpoint, port 587 with STARTTLS. If your network or device can only reach port 25, 80, or 443, SMTP2GO's wider port range is a real advantage.
• Lumail does not sell dedicated IPs, SMS, or inbound email.

See Lumail vs SMTP2GO side by side, or the SMTP setup guide.

2. Elastic Email: best for cheap mid-volume SMTP

Elastic Email is a long-running ESP with its own in-house MTA, sold as separate Email API and Email Marketing products. The Email API plan is the closest like-for-like swap for an SMTP2GO relay, with SMTP on ports 25, 2525, 587, and 465 and up to 15 SMTP credentials.

Pricing: Email API Free is 100 emails a day (3,000 a month). API Starter is $19 a month for 50,000 emails and Pro is $49 at the same volume. Private IPs are $40 a month on Starter.

Choose it if:

• You send around 50,000 emails a month and want a flat $19 plan for that volume
• You need port 2525 as well as 587 and 465
• You are an agency that needs white-label SMTP, subaccounts, and reseller tools (Pro)

Watch out for:

• Automations, webhooks, and inbound processing are Pro features.
• Switching an Email Marketing account to the Email API product requires a new account.

See the full Lumail vs Elastic Email comparison.

3. Mailgun: best for developers who also need inbound routes

Mailgun is Sinch's email API and SMTP relay (smtp.mailgun.org, with an EU host) on ports 25, 465, 587, and 2525. Unlike SMTP2GO, it receives mail too: inbound routes parse incoming messages to JSON.

Pricing: Free Send is 100 emails a day. Basic is $15 for 10,000 emails, then from $1.80 per 1,000. Foundation is $35 for 50,000, and Scale is $90 for 100,000.

Choose it if:

• You need to receive and parse replies as well as send
• You want US or EU data residency
• You send in batches through the API, up to 1,000 personalized messages per call

Watch out for:

• Inbox testing, validation packs, and previews are separate Optimize and Inspect subscriptions.
• The free tier is lower than SMTP2GO's.

See the full Lumail vs Mailgun comparison.

4. Amazon SES: best for the lowest rate per email

Amazon SES is AWS's email API and SMTP interface. It supports STARTTLS on ports 25, 587, and 2587, and TLS wrapper on 465 and 2465. For raw volume, nothing else here comes close on price.

Pricing: À la carte outbound is $0.10 per 1,000 emails with no monthly minimum, plus data charges. Dedicated IPs are $24.95 per IP per month.

Choose it if:

• Cost per email is the deciding factor
• Your apps already run on AWS
• You need inbound mail handling or archiving through Mail Manager

Watch out for:

• Production sending requires leaving the SES sandbox, and approval is not guaranteed.
• SMTP credentials are region-specific and separate from your AWS console keys, and you build reporting and event handling yourself.

See the full Lumail vs Amazon SES comparison.

5. Postmark: best for strict transactional deliverability

Postmark is a delivery service built for application email, with separate Message Streams for transactional and broadcast mail. SMTP runs on smtp.postmarkapp.com over ports 25, 2525, or 587 with STARTTLS.

Pricing: Free Developer is 100 emails a month. Basic is $15 for 10,000 emails, then $1.80 per 1,000; Platform is $18 with $1.20 per 1,000 extra.

Choose it if:

• Receipts and login emails matter more than anything else you send
• You want transactional and bulk reputation kept apart by design
• You need inbound parsing to JSON (Pro and Platform)

Watch out for:

• Postmark vets senders and is not built for list uploads or marketing campaigns.
• Its overage, $1.20 to $1.80 per 1,000, is at or above SMTP2GO's.

See the full Lumail vs Postmark comparison.

6. SendGrid: best for large volume on the Twilio stack

Twilio SendGrid offers an Email API and an SMTP relay at smtp.sendgrid.net:587, where the username is literally apikey. Pro plans include a dedicated IP, subusers, and SSO.

Pricing: Email API Essentials starts at $19.95 a month; Pro starts at $89.95. Marketing Campaigns is a separate subscription from $15.

Choose it if:

• You need subusers and dedicated IPs for several teams or clients
• You already buy SMS or voice from Twilio
• You want an Inbound Parse webhook alongside the relay

Watch out for:

• The free option is a 60-day trial.
• Searchable email activity is 3 days on Essentials, compared with 30 days on SMTP2GO paid plans.

See the full Lumail vs SendGrid comparison.

7. Brevo: best for email plus SMS and CRM

Brevo is a multichannel marketing platform that includes transactional messages alongside campaigns, SMS, WhatsApp, and a sales CRM. It suits teams who picked SMTP2GO partly for its optional SMS and now want marketing in the same place.

Pricing: Free is 300 emails a day. Starter is from $9 a month and Standard, which adds multi-step workflows, is from $18.

Choose it if:

• SMS, WhatsApp, and CRM are required channels
• A daily sending allowance matches how you send
• You want marketing and transactional email in one account

Watch out for:

• The free allowance is daily, so a single large send can hit the cap.

See the full Lumail vs Brevo comparison.

How to choose an SMTP2GO alternative

Treat it as a relay decision first, then decide how much sits on top.

• Ports and networks. Check which ports your servers, printers, or hosting provider allow outbound. 587 with STARTTLS is the common denominator; 2525 is the usual fallback.
• Relay only, or relay plus list. If a separate tool already holds your subscribers, a pure relay is enough. If you pay for two tools today, one platform can replace both.
• Volume tier and overage. Compare the per-1,000 rate at the volume you actually send, not the entry price.
• Dedicated IPs. SMTP2GO includes one from its 100,000-email plan. Price the equivalent elsewhere before you switch.
• Support model. SMTP2GO's paid plans include phone and live chat. If that is why you chose it, confirm what support the alternative includes.

Worked example: 50,000 emails a month. A small business sending 50,000 emails a month through its apps and a newsletter:

On price alone, Elastic Email and SES win at this volume. Lumail is the only one in the table that also includes your subscriber list, campaigns, and workflows in that price.

How to migrate from SMTP2GO

1. Export suppressions. Pull bounces, unsubscribes, and complaints from SMTP2GO, and export your list from whichever tool actually stores it, since SMTP2GO does not.
2. Authenticate your domain. Add SPF, DKIM, and DMARC records for the new provider while SMTP2GO keeps sending.
3. Swap SMTP settings on one sender. Change host, port, username, and password on a single app or device, send a test, and confirm delivery events.
4. Rebuild one automated email. If a mailing-list tool sent your welcome series, rebuild it as a workflow on the new platform and test it on a small segment.
5. Move the rest and cancel. Switch remaining apps and devices, watch bounces for a week, then downgrade SMTP2GO.

Frequently asked questions

What is the best free SMTP2GO alternative?

Lumail's free plan is 3,000 emails a month with no credit card, and Elastic Email's free Email API plan is 100 emails a day (about 3,000 a month). Both give more monthly room than SMTP2GO's 1,000-email free tier.

Is there a cheaper alternative to SMTP2GO?

Amazon SES is cheapest at $0.10 per 1,000 emails if you can run AWS. At 50,000 emails a month, Elastic Email's API Starter is $19 and Lumail is $26, compared with SMTP2GO's $30 plan.

What is the best SMTP relay alternative for sending from apps, servers, or devices?

Any relay that supports SMTP authentication works: enter the new host, port, username, and password. Pick Elastic Email or SES for pure price, Postmark for transactional deliverability, or Lumail if you also want the list and newsletter in the same account.

Does SMTP2GO have mailing lists or automation?

No. SMTP2GO is a delivery service without a subscriber database or journey builder, and its support recommends a separate tool such as Customer.io. Lumail and Brevo include lists and workflows with sending.

Who are SMTP2GO's main competitors?

Its closest competitors are other relays and email APIs: Mailgun, SendGrid, Amazon SES, Postmark, and Elastic Email. Lumail and Brevo compete when you want the relay and your marketing email in one product.

Switch the relay, keep your settings simple

If SMTP2GO is working and you only need a pipe, the cheapest relay that supports your ports is the right answer. If you are paying for a relay and a separate list tool, start Lumail free and point one sender at smtp.lumail.io:587 to see how it fits. Every head-to-head table is in the comparison hub.