Documentation-based comparison
Postmark versus SMTP2GO
Compare documented scope and conditions. Unknowns remain unknown; different billing units do not establish a cost winner.
What the evidence answers
A reading of reviewed official documentation for Postmark and SMTP2GO. It is not a hands-on test, a ranking or a recommendation of one product.
Price
- Postmark From $15/mo
- Free: no subscription charge
- Basic: $15.00 monthly
- Pro: $16.50 monthly
- Platform: $18.00 monthly
- High volume: Vendor quotation required
- SMTP2GO From $15/mo
- Free: no subscription charge
- Starter: $15.00 monthly
- Starter: $150.00 annual ($12.50/mo equivalent)
- Professional: $75.00 monthly
- Professional: $750.00 annual ($62.50/mo equivalent)
- Premier: Vendor quotation required
Both list prices on the same basis. Compare what each plan includes; the lower amount alone does not make the better choice.
Documented for both
- Sending volume
- Postmark Unused emails do not roll over to the next billing period.Free: 100 emails per monthBasic: 10,000 emails per monthPro: 10,000 emails per monthPlatform: 10,000 emails per month
- SMTP2GO Free: 1,000 emails per monthStarter: 10,000 emails per monthProfessional: 100,000 emails per monthPremier: More than 3,000,000 emails a month
- Sender domains
- Postmark Free: 10 custom sending domainsBasic: 5 custom sending domainsPro: 10 custom sending domainsPlatform: Unlimited custom sending domains
- SMTP2GO SPF and DKIM are set up automatically for your sending domains.
- Log retention
- Postmark Custom activity retention starts at USD 5 a month and is only available on Pro plans or higher; statistics are kept indefinitely.Basic: 45 daysPro: Customizable up to 365 days; 45 days by defaultPlatform: Customizable up to 365 days; 45 days by default
- SMTP2GO Free: 5 days of email reportingStarter: 30 days of email reportingProfessional: 30 days of email reporting
- Dedicated IP
- Postmark From USD 50 a month per IP, for accounts sending 300,000 or more emails a month on Pro or higher.
- SMTP2GO Professional: Dedicated IP address included
- Support
- Postmark Support requests are handled by the customer success team through support tickets.
- SMTP2GO Starter: ticket, chat and phone support.Free: Ticket support; toll-free phone and live chat for the first 14 days onlyProfessional: Ticket, chat and phone support
- Overage charges
- Postmark Extra emails on paid plans are calculated at the end of the billing cycle and added to the next month's charge.Free: No overages are allowed on Free.
- SMTP2GO Free: Extra emails are not permitted on Free.
Limits to check
- Postmark There is no tier between the free 100 emails a month and the 10,000-email paid tier.
- SMTP2GO The free plan is limited to 200 emails a day and does not allow extra emails.
Not verified yet
Every compared requirement has evidence for at least one.
Documented for one product only, shown in the table below: Postmark: webhooks and events.
Not verified means our reviewed sources do not establish it. It does not mean a product lacks the capability or that it costs nothing.
Next steps
- Ask SMTP2GO about webhooks and events; our sources do not establish it yet.
| Requirement | Postmark | SMTP2GO |
|---|---|---|
| Pricing | From $15/mo | From $15/mo |
| Who it is for | Sends transactional email and keeps bulk or broadcast email on separate Message Streams. Verified Oct 11, 2026 · Postmark: official product and plan documentation | Email delivery for transactional email from apps, everyday email from Outlook and marketing email with an unsubscribe link. Verified Oct 11, 2026 · SMTP2GO homepage |
| Coverage limits | There is no tier between the free 100 emails a month and the 10,000-email paid tier. Verified Oct 11, 2026 · Postmark: official product and plan documentation | The free plan is limited to 200 emails a day and does not allow extra emails. Verified Oct 11, 2026 · SMTP2GO pricing, loaded monthly plan cards |
| Sending volume | Unused emails do not roll over to the next billing period. Verified Oct 11, 2026 · Postmark: official product and plan documentation
|
|
| Sender domains |
| SPF and DKIM are set up automatically for your sending domains. Verified Oct 11, 2026 · SMTP2GO homepage |
| Log retention | Custom activity retention starts at USD 5 a month and is only available on Pro plans or higher; statistics are kept indefinitely. Verified Oct 11, 2026 · Postmark: official product and plan documentation
|
|
| Webhooks and events | Inbound email is converted to JSON and posted to your webhook URL. Verified Oct 11, 2026 · Postmark: official product and plan documentation
| Not verified |
| Dedicated IP | From USD 50 a month per IP, for accounts sending 300,000 or more emails a month on Pro or higher. Fully managed by Postmark. Verified Oct 11, 2026 · Postmark: official product and plan documentation |
|
| Support | Support requests are handled by the customer success team through support tickets. The pricing page lists no support level per plan. Verified Oct 11, 2026 · Postmark support centre | Starter: ticket, chat and phone support. Verified Oct 11, 2026 · SMTP2GO: official product and plan documentation
|
| Overage charges | Extra emails on paid plans are calculated at the end of the billing cycle and added to the next month's charge. Verified Oct 11, 2026 · Postmark: official product and plan documentation
|
|
| Coverage note | Starting tier; unlimited emails per day. Not listed on the Basic card. | At the default volume shown. |