ActiveCampaign PostmarkReviews of postmarkapp.com

I have been using their services for my company for the past four months. Eight days ago, I started receiving complaints from multiple customers who had not received their invoices by email. I run a website that sells services and processes approximately 200 transactions per day. As a result of this issue, 1,600 customers have not received their invoices. My website operates 100% autonomously, meaning I do not need to intervene manually to check whether emails are being sent. The entire process is automated. Today, I discovered that my bank accounts had been frozen due to the failure to deliver invoices to my customers. I am paying for their $126.50/month plan. I issued all the invoices correctly; however, Postmark failed to deliver the emails. I have lost over 1,000 customers because they were unable to create accounts in my application. My financial losses are in the tens of thousands of dollars, and I have been unable to get a proper response from their support team for four days. I have sent them more than 30 messages, yet instead of receiving meaningful assistance, I am forced to interact with an AI chatbot. This is absolutely unacceptable. Shame on you!

We use Postmark for transactional email on a paid plan. After they flagged “unusual activity,” they paused our outbound stream and queued our mail. We did what they asked (rotated the Server API Token, deleted the old one, enabled IP allowlisting) and opened a support ticket with the server/stream details. Hours later the ticket was still in “new” status. Their chat bot only added follow-ups; no human replied, even though sending was blocked and this is a production service. The API still returned OK on test sends, but messages never appeared in Activity — so the stream stayed effectively unusable. I understand providers must protect against abuse. What I cannot accept is that a paid transactional service can be suspended at their discretion while support is unreachable in an emergency. If uptime and human response matter to you, look carefully before relying on Postmark as your only mail path. We had to fall back to another provider to keep our product working.

They have a good product when it works, but support is slow and unresponsive. You're supposed to be paying a premium so you don't have to worry, and that used to be the case. After Active Campaign bought them, its gone downhill. I'll only use them as a backup now.

Pagas y no solucionan.

Postmark has honestly been a bit of a mixed bag for me. On the positive side, the platform itself is genuinely excellent. The backend is clean, intuitive, and very easy to use, even if you're managing multiple servers or transactional streams. Setup is straightforward, the interface makes sense, and—most importantly—the actual mail delivery has been relatively flawless in my experience. Messages go where they need to go, quickly and reliably, which is exactly what you want from a transactional email provider. Pricing is competitive too, which makes the whole package look very appealing on paper. Unfortunately, where Postmark falls down badly is customer support. I recently lost access to my 2FA codes—completely my own fault, I’ll own that. But what followed has been one of the most frustrating support experiences I’ve had in a long time. My initial attempt to get help was met with an irritating AI-driven email bot that repeatedly failed to verify information I was providing, despite me using the email address already associated with the account. After eventually getting escalated to a human, I provided what I’d consider more than enough evidence to prove account ownership: credit card details, invoice numbers, server/account information—you name it. Only then to be told that apparently a "manager" would need to reset the 2FA. That was nearly two weeks ago. And still… nothing. At this point, what should have been a relatively straightforward account recovery process has dragged on to the point where I’m genuinely considering cancelling the automated payments through my bank and moving to another provider altogether. Which is a real shame. Because the actual product is good. Really good, in fact. But even the best platform becomes difficult to justify if support feels this slow, outdated, and disconnected. In an era where account access issues should be handled efficiently and professionally, this experience has felt oddly prehistoric. Great system. Great deliverability. Fair pricing. But customer service urgently needs serious improvement.

We are observing a progressive degradation in delivery webhook timing. Messages that were delivered immediately yesterday are now returning delivery confirmations hours later. Since our sending engine relies on real-time delivery feedback, delayed callbacks directly reduce our sending performance and impact production workflows. We need this issue escalated to the deliverability

I am both a customer and a victim of repeated unwanted emails from ActiveCampaign — and this situation has been ongoing for over 5 weeks. Despite: - Multiple unsubscribe attempts - Explicit written requests to stop all emails - Direct exchanges with their support team - Confirmations from their side that I was “successfully removed” => I am STILL receiving their emails. Even worse: - The unsubscribe link confirms that I am already unsubscribed - Their support keeps asking me to repeat basic steps I have already done multiple times - I provided full technical email headers proving the emails are sent directly by their own infrastructure Yet they continue to deflect responsibility or send irrelevant automated responses At this point, this is no longer a “technical issue” — this is either: - a serious failure in their system - or a complete lack of control over their own platform Both are extremely concerning for a company whose core business is email marketing and GDPR compliance. Let me be very clear: If ActiveCampaign cannot even guarantee proper unsubscribe handling for its own emails, how can their clients trust that their campaigns are compliant? This raises a major risk: Their users may believe they are GDPR compliant while their emails continue to be sent against recipients’ consent. As of today: - The issue is still unresolved - Support responses are repetitive and ineffective - No concrete action has been taken despite weeks of escalation This is unacceptable. I strongly advise anyone relying on this platform to question the reliability of their compliance mechanisms. Because if this can happen at their level, it can happen to you.

We used SendGrid for 6 months and it was a constant headache. Our welcome emails, order confirmations, and even password reset emails were either landing in spam or getting outright blocked by Hotmail. Our clients were frustrated, and so were we. SendGrid's only solution? Purchase a dedicated IP for $30 USD/month on top of our API costs — completely unreasonable for roughly 1,000 emails a month. After some research, we discovered Postmark and decided to give it a try. Within 3 days, every single email we sent landed directly in the inbox — 100% deliverability. For $15/month (cheaper than SendGrid), the quality is on another level. Yes, Postmark is strict about commercial/bulk emails, but that's exactly the point. By keeping spammers off the platform, they protect deliverability for legitimate senders like us who rely on shared IPs. That strictness is a feature, not a limitation. The API migration from SendGrid was straightforward — minimal code changes on our backend. If you're a small business struggling with email deliverability, do yourself a favour and switch to Postmark. It's been a game changer.