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Overage / Email APIs

Postmark pricing and rate limits

Email APIspostmarkapp.comReport a correctionChange history (0)

Verified 2026-10-23 (2 days ago)Source: postmarkapp.com/pricing, postmarkapp.com/developer/user-guide/send-email-with-api

Cost at your volume

Monthly cost per tier at the volume entered above
TierMonthly costBreakdown
Free$0 / monot feasibleexceeds 100 Emails sent included
Basic$15 / mo$15 / mo cheapestbase $15
Pro$16.50 / mo$16.50 / mobase $16.50
Platform$18 / mo$18 / mobase $18

Cheapest: Basic at $15/mo. Free ruled out: Emails sent exceeds its 100 included.

Example volumes you can edit; not vendor data. Costs use the shared Overage cost function, identical to the API and MCP. Usage the vendor does not price is excluded, never guessed. Optional add-ons are not included in these totals. Overage marked pay-as-you-go applies only if you enable it; otherwise the allowance is a hard cap.

Tiers

Postmark tiers: price, included allowances, overage rates, limits and features
ItemFreeBasicProPlatform
Base price
Price$0 / mo$0.00/mo source$15 / mo$15.00/mo source$16.50 / mo$16.50/mo source$18 / mo$18.00/mo source
Included
Emails sent
100 / mo100 emails/month. source
10,000 / moStarting at 10,000 emails/month. source
10,000 / moStarting at 10,000 emails/month. source
10,000 / moStarting at 10,000 emails/month. source
Custom domainsunlisted
5 / cap5 Custom sending domains source
10 / cap10 Custom sending domains source
unlisted
Overage rates
Emails sentunlisted
$1.80 per 1,000Extra emails @ $1.80 / 1,000 source$1.80 / 1,000 emails
$1.30 per 1,000Extra emails @ $1.30 / 1,000 source$1.30 / 1,000 emails
$1.20 per 1,000Extra emails @ $1.20 / 1,000 source$1.20 / 1,000 emails
Add-ons (not in the calculator total)
DMARC monitoringunlisted$14 / moStarts at $14/month per domain source$14 / moStarts at $14/month per domain source$14 / moStarts at $14/month per domain source
Dedicated IPsunlistedunlisted$50 / moStarts at $50/month per IP source$50 / moStarts at $50/month per IP source
Custom activity retentionunlistedunlisted$5 / moStarts at $5/month source$5 / moStarts at $5/month source
Features
data retention daysunlisted4545-day data retention source45Customizable data retention up to 365 days (45-day default) source45Customizable data retention up to 365 days (45-day default) source

Prices in USD, per the vendor's billing period. Hover or focus a number for the line it came from, with a link to the stored snapshot. "unlisted" means the vendor does not publish it; we never fill the gap.

Add-ons

Optional add-ons and their prices
TierAdd-onPrice
BasicDMARC monitoring$14 / moStarts at $14/month per domain source
ProDedicated IPs$50 / moStarts at $50/month per IP source
ProCustom activity retention$5 / moStarts at $5/month source
ProDMARC monitoring$14 / moStarts at $14/month per domain source
PlatformDedicated IPs$50 / moStarts at $50/month per IP source
PlatformCustom activity retention$5 / moStarts at $5/month source
PlatformDMARC monitoring$14 / moStarts at $14/month per domain source

Add-ons are optional extras and are not included in the calculator total.

Rate limits

No rate limits recorded for this service: unlisted.

Change timeline

No changes recorded.

Tracking began 2026-10-24; no change has been detected since.

Sources

Captured source pages and their last snapshot
URLKindLast capturedSnapshot
postmarkapp.com/pricingpricing2026-10-24snap_postmark-pricing-0_20261023T184049Z
postmarkapp.com/developer/user-guide/send-email-with-apilimits2026-10-24snap_postmark-limits-0_20261023T184051Z

Report a correction

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