Mailgun delivers strong email service reliability and setup ease, with exceptional support responsiveness that drives the 4.2/5 rating, but is undermined by critical account management issues and billing problems for a vocal minority.
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I deleted the account and they are still charging my card.
This has happened multiple times where there account verification would not send the one time verification code on the mobile during the sign up process. I have had to contact the customer service for such basic processes which should work. How can they be trusted in delivering the emails when they can't fix there internal issue.
Very poor experience. The sign-up process seems simple, but it is impossible to activate the account: I never received the verification code on my phone, which completely blocks access to the service. Despite this, I was charged €3.34 without being able to use the platform at all. The most frustrating part is the total lack of human support: there is no way to get real assistance for what is a basic issue. In the end, the service is unusable, the charge is unjustified, and there is no support. I do not recommend.
Poor Support! They will constantly cancel your demo sessions. If they are not responding before we are their client, imagine if you get any trouble while using their product.
We have a major production issue that has now been waiting for a response for 2.5 days. Customers can't send email, can't run their business! I can't delete the affected domain and I can't create an alternate. Absolytely terrible support.
We have a production issue which we raised yesterday and we still have no response. This is affecting our customers and we have no way of getting hold of them. Issue Logged Request #4071012 Updated 15/04/2026 : The response they mention in there response is an automatic generated response to say that someone will look into it. They only responded due to this review.
Misleading Pricing, Useless Support, and Real Business Damage ⭐☆☆☆☆ I've been a Mailgun customer with 15 accounts and recently had an experience that pushed me to start migrating everything out. Our transactional emails — 2FA login codes and time-sensitive legal DMV documents — started landing in spam or getting deferred for Yahoo, AOL, Hotmail, and Outlook recipients. The culprit was a shared IP (143.55.232.45) flagged by Yahoo with error TSS04 due to other senders on the pool. We had nothing to do with the reputation problem, but our customers paid the price — unable to log in, unable to receive legal documents with regulatory deadlines. When I escalated, support spent days going in circles telling me to "wait for it to clear up." A 2FA code that arrives 8 hours late is completely useless. To make matters worse, their pricing page shows a green checkmark for "Dedicated IP access" on the Foundation 50k plan. I chose that plan specifically for that feature. Turns out it means nothing — a dedicated IP costs an additional $59/month on top. That is genuinely deceptive advertising, not a gray area. We moved to Postmark. Problem solved instantly. Night and day difference — completely transparent pricing, no hidden add-ons, and their deliverability just works out of the box. No runaround, no finger-pointing at recipient servers, no waiting days for a resolution that never came. If you depend on email for critical business operations, do not rely on Mailgun's shared infrastructure or their support team to protect you when something goes wrong. There are better, more honest providers out there — and we found one.
Based on 40 verified customer reviews, Mailgun holds an average rating of 4.2 out of 5 — rated Great on ReviewTerminal. 80% of customers gave 4 or 5 stars.