The Postmark agency.Your email lands, not spam.
Postmark is built to make transactional email land, but pointed at a domain with broken auth your receipts and resets still drop into spam. We do full domain verification, DKIM and a custom Return-Path so your mail passes DMARC, split your message streams, and wire the webhooks.
★★★★★Verified Trustpilot reviews · AI, automation & growth agency
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GeminiA Postmark agency makes your mail land, not just creates the account.
Anyone can sign up for Postmark. Authenticating your domain so it passes DMARC, splitting message streams, and wiring the webhooks your app needs is a different job. Here are the four things we own.
- DNS & authentication
Domain auth done right so your mail passes DMARC
Sender Signatures alone won't get you to the inbox. We do full domain verification in Postmark, publish the DKIM CNAME, and set a custom Return-Path so SPF aligns and your transactional email passes DMARC instead of landing in spam. We check your existing SPF, DKIM and DMARC records first, fix what's broken, and leave you with an authenticated sending domain your app can rely on.
See a typical setup - Message streams
Transactional and broadcast kept on separate streams
Postmark's whole edge is keeping your critical mail away from your promo mail. We set up your message streams so receipts, password resets and notifications go through the transactional stream and never share a reputation with a newsletter blast. Mix the two on one stream and a marketing send can drag down the deliverability of the email your users actually need. We wire the separation cleanly.
See the method - API, SMTP & webhooks
Wired into your app with bounce and delivery webhooks
We connect Postmark to your codebase the right way: the REST API for new builds (Node, Ruby, .NET, Java, PHP or a community SDK), or SMTP relay when a legacy system needs it. Then we wire the webhooks that matter, bounce, spam complaint, delivery, open and click, so your app reacts to a hard bounce instead of mailing a dead address for weeks. Inbound parsing too, if you process replies.
See the integrations - Templates & monitoring
Templates, layouts and delivery you can watch
We build your transactional templates and shared layouts in Postmark so every receipt and reset is on-brand and consistent, then set up the monitoring so you see bounces, spam rates and delivery before a customer complains. We're an automation and AI agency first, so this plugs into the rest of your stack instead of sitting in a silo. Need broader email and AI work, that's our Claude agency.
See AI enablement
We set up Postmark like delivery infrastructure, not a checkbox.
Most Postmark setups stop too early: a Sender Signature, an API key, and a quiet assumption it'll just work. Then receipts land in spam, hard bounces pile up, and a marketing send wrecks the reputation of the transactional mail. So we treat it as infrastructure: authenticated for DMARC, streams split, webhooks wired, delivery watched.
- Audit · check your domain, current SPF, DKIM and DMARC, and where mail is failing
- Authenticate · full domain verification, DKIM CNAME, custom Return-Path for DMARC
- Integrate · API or SMTP, message streams split, the webhooks that matter wired
- Monitor · templates, suppression handling and delivery dashboards you can watch
We ship transactional email on our own apps.
We don't sell a partner tier. We run transactional email on our own products, so we set Postmark up the way it actually works: full domain verification, a custom Return-Path for DMARC alignment, streams split, and webhooks that suppress bounces automatically. That's exactly what's missing when a setup ends at creating an account and grabbing an API key.
- We set Postmark up for what it's built for: transactional delivery. If you need bulk newsletters, we'll tell you to use a broadcast tool instead, not oversell you.
- DMARC alignment is the part most setups skip. We do the custom Return-Path and full domain verification so your mail actually passes, not just an SPF check.
- You leave autonomous: the DNS records, streams and webhooks live in your accounts and codebase, owned by your team, not locked behind us.
- No badge to sell. We're judged on whether your receipts and resets land in the inbox after we leave, not on a partner tier.
Postmark at the core, your sending stack around it.
We configure the parts that turn Postmark into reliable delivery, then connect them to your app and DNS. Here's what a real setup covers.
- Setup
Domain verification & DKIM
We run full domain verification in Postmark and publish the DKIM CNAME, so every message is signed with a key tied to your domain instead of relying on per-address Sender Signatures.
- Setup
Custom Return-Path & SPF
We set a custom Return-Path subdomain so SPF aligns to your From domain, the missing piece that lets Postmark mail pass strict DMARC alignment rather than just an SPF check.
- Setup
Message streams
We configure transactional and broadcast streams separately so your receipts and resets keep a clean reputation and never get dragged down by a marketing send on the same pipe.
- Setup
API & SMTP integration
We wire Postmark into your app via the REST API for new integrations, or SMTP relay for legacy systems, with proper error handling so a send failure never goes silent.
- Setup
Webhooks & event handling
We set up bounce, spam complaint, delivery, open and click webhooks so your app stops mailing dead addresses, suppresses complainers, and logs what actually happened to each message.
- Setup
Templates & inbound parsing
We build your templates and shared layouts so transactional mail stays on-brand, and set up inbound email parsing when you need to turn replies into structured data your app can act on.
We check why your mail isn't landing, you leave with a plan.
Before quoting anything, we take 60 minutes to look at your domain, your SPF, DKIM and DMARC records, and where your transactional email is failing. You leave with an honest read on what Postmark fixes, what to authenticate first, and whether your problem is even an email tool problem. Zero pitch, just an engineer's take on your deliverability.
- An honest read on why your mail lands in spam
- The DNS auth and DMARC alignment to fix first
- The message streams and webhooks worth wiring
- A frank take on whether Postmark is the right fit
How we run a Postmark setup.
Five steps, in order. We don't send a production email before the domain passes DMARC, we don't leave webhooks unwired, and your team owns the setup at the end. Each step has a deliverable and you sign off before we move on.
- Step 1 · Deliverability audit
Find out why your mail isn't landing
We look at your domain, your current SPF, DKIM and DMARC records, and where your transactional email is failing: spam folders, hard bounces, a missing Return-Path, a sending domain with no reputation. We check whether you're even on the right tool. Half the value is an honest read on whether Postmark fixes your problem or whether the issue is content, list hygiene or the wrong message stream.
- Step 2 · Authenticate the domain
Full domain verification and DMARC alignment
We do full domain verification in Postmark, publish the DKIM CNAME, and set a custom Return-Path subdomain so SPF aligns to your From domain. That's the piece most setups skip, and it's why their mail passes an SPF check but still fails DMARC. We get your authentication right so mailbox providers trust the sender, then confirm it with the DNS tools before any production send.
- Step 3 · Wire the integration
API, SMTP, streams and webhooks
We connect Postmark to your app via the REST API (or SMTP relay for legacy systems), split your transactional and broadcast message streams, and wire the webhooks that matter: bounce, spam complaint, delivery, open and click. Your app suppresses hard bounces, reacts to complaints, and logs delivery, instead of mailing dead addresses and quietly wrecking your reputation.
- Step 4 · Templates & inbound
Build the templates and parse replies
We build your transactional templates and shared layouts so every receipt, reset and notification is consistent and on-brand, edited in one place. If you process replies, we set up inbound email parsing so Postmark turns incoming mail into structured data your app can act on. Everything ships with its streams and webhooks already wired, not as a half-finished integration you inherit.
- Step 5 · Monitor & hand over
Set up monitoring, then get out of the way
We set up the delivery monitoring so you see bounces, spam rates and open and click data before a customer complains, and document the streams, webhooks and DNS records so your team owns the setup. If you want to go deeper on email automation and AI, our agency covers that. If you just want it running and handed back, we hand it back clean, no lock-in.
We're judged on the mail that lands.
No partner badge to display, so we lead with what matters: feedback from the teams whose Postmark setup we ran, and whether their transactional mail kept landing after we left. Our Trustpilot reviews come from those teams, not from a marketing deck.
- The DNS records, streams and webhooks live in your accounts, owned by your team
- DMARC alignment confirmed before any production send
- Bounces and complaints suppressed automatically by webhook
- Trustpilot reviews come from the teams we set it up for
The questions we get asked on repeat.
What does a Postmark agency actually do?
A Postmark agency sets up your transactional email so it lands instead of leaving you guessing why receipts go to spam. We handle DNS authentication (full domain verification, DKIM, a custom Return-Path so SPF aligns and your mail passes DMARC), split your transactional and broadcast message streams, wire Postmark into your app via the API or SMTP, set up bounce, spam and delivery webhooks, and build your templates. The point is your app's password resets, receipts and notifications reliably reaching the inbox, not a tool half-configured by someone who left.How much does a Postmark setup cost?
It depends on scope: authenticating a domain and wiring basic sending is nothing like splitting message streams, building templates, and handling webhooks and inbound parsing across a real app. We don't throw out a flat package. We start with a free 60-minute audit to find why your mail isn't landing and what Postmark actually fixes, then quote a fixed scope. The Postmark plan itself you pay them directly; we set up the streams and volume so the bill stays predictable.Why is my transactional email going to spam with Postmark?
Usually it's authentication. Postmark mail passes SPF by default because the Return-Path uses Postmark's IPs, but to pass strict DMARC alignment you need full domain verification, a published DKIM CNAME, and a custom Return-Path so SPF aligns to your From domain. Most setups stop at a Sender Signature and wonder why mail still lands in spam. We fix the DNS records, set the custom Return-Path, and confirm DMARC alignment, which is the difference between an SPF check passing and your mail actually being trusted.What are message streams and why do they matter?
Message streams are how Postmark keeps your critical mail away from your promotional mail. Transactional messages (receipts, password resets, notifications) go through a transactional stream; newsletters and broadcasts go through a separate one. The point is reputation: if a marketing blast gets flagged, you don't want it dragging down the deliverability of the email your users actually need. We set up the streams so the separation is clean, which is most of why teams pick Postmark over a single-pipe service.Can you integrate Postmark with our app via API or SMTP?
Yes. For new builds we use the REST API, which gives precise control and has official libraries for Node, Ruby, .NET, Java and PHP plus community SDKs for many more languages. For legacy systems that only speak SMTP, we use SMTP relay. Either way we add proper error handling so a failed send never goes silent, and wire the bounce and delivery webhooks so your app reacts to what happens after the send, not just whether the API call returned 200.What webhooks should we set up with Postmark?
The ones that protect your reputation and your users. Bounce webhooks so your app suppresses a hard-bounced address instead of mailing it for weeks. Spam complaint webhooks so you stop sending to someone who flagged you. Delivery webhooks to confirm mail landed, plus open and click if you track engagement. We wire these into your app so it acts on the events automatically, and inbound parsing too if you turn replies into structured data.Is Postmark the right fit if we send marketing newsletters?
Honestly, not on its own. Postmark is built for transactional email, the receipts, resets and notifications triggered by your app, and that focus is exactly why its deliverability is strong. For bulk marketing newsletters you want a dedicated broadcast or marketing tool, and we'll point you to the right one instead of bending Postmark into a job it isn't designed for. If you send both, we set up Postmark for the transactional side and keep your marketing sends on a separate platform so neither hurts the other.How long does a Postmark setup take?
For a scoped setup (domain authentication, message streams, basic integration and a few templates), it's fast: the DNS auth and verification are the gating items and depend on your DNS provider propagating records. Building out templates, wiring every webhook, adding inbound parsing and monitoring across a real app takes longer. We split it into batches so your transactional mail is authenticated and landing first, then layer on templates and event handling, rather than waiting on a big-bang launch.
Stop guessing why mail bounces. Set it up right.
A 60-minute audit, your deliverability mapped, a setup plan with DMARC alignment baked in. If your team can run it in-house after setup, we'll hand you the playbook. If we're the right fit, we handle it.