MailerSend, Inc. Reviews 206

TrustScore 4 out of 5

4.2

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Review summary

Based on reviews, created with AI

Reviewers had a great experience with this company. Customers consistently praise the staff for their helpfulness and positive attitude, making interactions pleasant and productive. Customer service is frequently highlighted as exceptional, with many people appreciating the personalized, understanding approach and the quick response times. The service provided is often described as excellent, with consumers noting the efficiency and ease of their overall experience and the smooth user experience. However, some customers also noted issues with account verification and application rejections, finding the explanations vague and unhelpful. A few other people also felt that the service became operationally unreliable due to compounding changes and additional sending limits, which they found to break a fundamental assumption of a transactional email service.

What people talk about most

Customer service

Reviewers highlight positive aspects of customer service, consistently praising the support team for being... See more

Response time

People report positive experiences with response times, often highlighting the speed and efficiency of... See more

Service

Consumers find service to be positive, highlighting its responsiveness, efficiency, and reliability. Many... See more

User experience

Clients share positive opinions on user experience, highlighting the platform's user-friendly and intuitive... See more

Staff

Reviewers consistently express high satisfaction with the staff, particularly the support team. Customers... See more

Based on these reviews

Rated 4 out of 5 stars

Despite an overly complicated start, mostly my fault for mistakenly creating two accounts, the support team were excellent in taking patient time to sort it out. The trial version just didn't work... See more

Company replied

Rated 4 out of 5 stars

Thanks to Mark and Ben who assisted me with my SMTP query, which was resolved today. You were thorough and willing to help until I fully understood how your platform worked. Appreciate your pat... See more

Company replied

Rated 4 out of 5 stars

I have to say that MailerSend support is exceptional and although they cannot fully see each client's setup, they ask all the right questions so that I simply have to provide the details accordingly... See more

Company replied

Rated 5 out of 5 stars

Great solution for my personal and business email. After having issues with our existing ISP and send mail services, these guys rock. Great platform and super fast technical help and response. Rea... See more

Company replied


Company details

  1. Email Service Provider
  2. Internet Marketing Service
  3. Software Vendor

Written by the company

MailerSend is a hassle-free transactional messaging service designed so that developers can integrate transactional email and SMS quickly and effortlessly into their stack. Intuitively designed so anyone can contribute, with a powerful sending infrastructure and flexible payment plans that empower you to scale your sendings quickly. With over a decade of deliverability expertise, and inbuilt email verification, you can rest easy knowing your sender reputation will remain intact. Plus, premium features including sender identities, dedicated IPs and priority support make for an advanced, comprehensive solution. Get started for FREE with 500 emails per month, then upgrade for as little as $7/month for up to 5,000 emails!


Contact info

4.2

Great

TrustScore 4 out of 5

206 reviews

5-star
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1-star

Replied to 83% of negative reviews

Typically replies within 2 weeks

How this company uses Trustpilot

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Rated 5 out of 5 stars

Excellent service

Prompt response, very patient, detailed explanation

March 12, 2025
Unprompted review
MailerSend, Inc. logo

Reply from MailerSend, Inc.

Thank you so much for the awesome review! We’re so happy to hear you had a great experience with our support team. If you ever need anything else, don't hesitate to reach out!

Rated 1 out of 5 stars

If you looked up the legal definition…

If you looked up the legal definition of Fraud by False Representation, you would see MailerSend. Even the name is misleading.

We wanted a cheap solution for transactional emails used internally. Clearly that was too much of an ask. They throw at you the SMTP relay credentials for you to plug into your application, & it doesn’t authenticate.

Nothing works with this company. Of course, they did the standard deflection practice that all staff use when they know that their product is s*** but can’t admit it by way of stating that “we have had no other complaints”, clearly not realising they have a Trustpilot profile with a one-star rating.

They then expect you to troubleshoot their product, like I have the time to do that. Unless a company is willing to pay me for my time, I will not troubleshoot another companies product. I design software myself, I would not dream of asking an end user to troubleshoot any software I design.

They even replied to their review claiming it works despite the mass of one-star reviews claiming the opposite.

Poor product, poor “support” staff. We closed our account within 24 hours.

February 24, 2025
Unprompted review
MailerSend, Inc. logo

Reply from MailerSend, Inc.

We’re sorry to hear about your experience. Our team tested the provided SMTP credentials and confirmed they were working correctly. We also shared troubleshooting steps and were actively working with you toward a solution, but we understand your decision to close your account.

We always aim to assist as best we can and appreciate you giving MailerSend a try.

Rated 1 out of 5 stars

they stopped processing our emails…

they stopped processing our emails because our misspelled their account names, and wanted us to pay for another address validation service to continue processing

February 14, 2025
Unprompted review
MailerSend, Inc. logo

Reply from MailerSend, Inc.

Hi Péter, we understand how frustrating email deliverability issues can be. Your account was flagged due to a high bounce rate, which impacts sender reputation and email performance. We take deliverability and compliance seriously to ensure the best experience for all users. That’s why we recommend using email validation methods, such as CAPTCHA on forms or a verification tool of your choice.

If you’d like to discuss this further, feel free to reach out, we’d be happy to assist.

Rated 1 out of 5 stars

Terrible Ethics!

Terrible Ethics!! Terrible Customer Service. They will increase their price and auto charge your card and not give you a credit back. Terrible.

February 10, 2025
Unprompted review
MailerSend, Inc. logo

Reply from MailerSend, Inc.

Hi Adam,

Thank you for your feedback. Our paid plans renew automatically as outlined in our Terms of Use, and we sent prior communication regarding the price adjustment to all our customers. We completely understand that unexpected charges can be frustrating, and we always aim to be as transparent as possible about our policies.

If you have any further questions or concerns, feel free to reach out. We’d be happy to clarify anything.

Rated 5 out of 5 stars

Reliable & pleasure to work with

Compared few mailing services and have been using MailerSend for awhile now and must say it is a pleasure to deal with and looking forward for their launch of text messaging service for Europe!

February 7, 2025
Unprompted review
MailerSend, Inc. logo

Reply from MailerSend, Inc.

Thank you so much for sharing your experience, Dian! 😊 We’re so happy to hear you’re enjoying MailerSend. And yes, we’re just as excited as you are to bring text messaging to Europe too! It won’t be long now, so stay tuned!

Rated 5 out of 5 stars

Great experience & Support

So far a great experience and a very helpful and professional support team behind!

February 5, 2025
Unprompted review
MailerSend, Inc. logo

Reply from MailerSend, Inc.

Thanks so much for your kind words, Katerina! We’re happy to hear you’ve had a great experience and that our support team has been helpful. If you ever need anything, just reach out- we’re always here for you!

Rated 1 out of 5 stars

STAY AWAY FROM THIS COMPANY!!!

STAY AWAY FROM THIS COMPANY!!!
It’s impossibly hard to use without any support or resources. This is waste of time and funds i have amazing skills for email management and marketing but this was the worst system ever and i wasn’t able to use it. They have horrible product and even horrible customer service which is never helpful. I canceled without being able to use their service and paid for standard plan but never got to use it. Wasted my time and nerves and there is no refunds whatsoever. If there is one company i definitely hate its this one. Save yourself and stay away! They don’t care and want to scam people into buying their shitty products .

February 3, 2025
Unprompted review
MailerSend, Inc. logo

Reply from MailerSend, Inc.

Thank you for sharing your experience, Liana. We’re sorry to hear that MailerSend wasn’t the right fit for you. Our team works hard to provide a powerful yet accessible platform with helpful resources, and we appreciate your feedback.

Our policies, including those related to refunds, are outlined in our terms to ensure transparency. If you need any further clarification, feel free to reach out!

Rated 5 out of 5 stars

SMTP service is amazing

I use MailerSend for their SMTP service, which is for certain amount of emails free. It works flawelessly and when I have a problem or some issue, I just turn to their live chat and ask them directly. They almost immediately respond and help you solve your issue. I will keep using them for SMTP service and if you are in the same boat as me (using Wordpress and would like to avoid sending emails via PHP) then Mailersend is the provider to go.

Keep up the great work guys.
Cheers.

January 27, 2025
Unprompted review
MailerSend, Inc. logo

Reply from MailerSend, Inc.

Thank you so much for the kind words, Adam! We’re so glad to be part of your WordPress setup, and it’s great to hear that MailerSend has been working so well for you. If you ever need help, you know where to find us!

Rated 1 out of 5 stars

A Frustrating Experience

Tried MailerSend for 1 day couldn’t even send 3 test emails to my personal accounts. Account wasn’t approved, and my API key got blocked without explanation. Double-checked their terms, broke no rules, but got zero support or clarification. If you want surprises in production, go ahead. Otherwise, avoid this service.

January 24, 2025
Unprompted review
MailerSend, Inc. logo

Reply from MailerSend, Inc.

Thank you for taking the time to share your experience with MailerSend, Arif.

To ensure the security and integrity of our platform, all accounts go through a detailed review process. Unfortunately, we couldn’t approve your account due to issues encountered during this process. We strive to provide a seamless experience for all users, but maintaining a safe and compliant environment for email deliverability remains one of our top priorities.

Rated 5 out of 5 stars

MailerSend Customer Service is Great

I have found MailerSend customer service to be very helpful.
I was able to chat with them and get responses very quickly!

January 20, 2025
Unprompted review
MailerSend, Inc. logo

Reply from MailerSend, Inc.

Thanks so much for sharing your experience, Raphi! Don’t hesitate to reach out anytime, we’re always here to help!

Rated 5 out of 5 stars

Exceptional Support from MailerSend Team During a Challenging Situation



We recently encountered an issue where our API key was accidentally leaked, leading to malicious activities on our MailerSend account. This included unauthorized upgrades to higher-tier plans and a significant number of fraudulent charges.

When we reached out to MailerSend's support team, they were incredibly patient and thorough in analyzing the situation. They not only helped us identify what had gone wrong but also guided us through improving and optimizing our service's vulnerabilities. Thanks to their support, we were able to implement the necessary fixes and restore our service to normal operation.

What stood out the most was MailerSend's commitment to resolving the issue. They took care of the unauthorized charges, reverted our account back to the original plan, and ensured we faced minimal losses.

We are deeply grateful for the professionalism and support provided by the MailerSend team. Their prompt and effective assistance turned a stressful situation into a manageable one, and we highly recommend their service.

January 4, 2025
Unprompted review
MailerSend, Inc. logo

Reply from MailerSend, Inc.

We’re so glad we could help resolve the issue and get everything back on track for you. Your feedback means a lot to us, and we’re here whenever you need us!

Rated 1 out of 5 stars

Fraud Service

I’m deeply disappointed with my experience using MailerSend. Here’s what happened and why I cannot recommend their services:

Unauthorized Charges: While on the Hobby Plan, I was shocked to receive an invoice for over $9,000 USD. Upon investigation, I found that an unauthorized user had upgraded my subscription without my consent. I immediately deleted the user, changed my admin password, and activated two-factor authentication (2FA) to secure my account.

Recurring Compromises: Despite being the only user on the account and securing it with 2FA, the same issue happened again. It is baffling how unauthorized activity could still occur, suggesting a deeper issue with MailerSend’s platform security.

Lack of Resolution: I reached out to MailerSend support, but their response has been inadequate. They failed to address how these breaches occurred or provide a satisfactory resolution. As a paying customer, I expected a prompt investigation and refund for the unauthorized charges, but this was not delivered.

Platform Security Concerns: Based on my experience, I believe the issue may not be limited to my account but could indicate a broader security vulnerability within MailerSend’s system. If their platform cannot protect accounts secured with 2FA, it raises serious concerns about their overall security infrastructure.

Recommendation: I cannot, in good conscience, recommend MailerSend to anyone. Their failure to secure accounts and address unauthorized activities has cost me time, money, and trust. If you’re considering using their service, I strongly urge you to look elsewhere.

January 5, 2025
Unprompted review
MailerSend, Inc. logo

Reply from MailerSend, Inc.

Thank you for sharing your feedback, Tony. To clarify, the transaction you mentioned did not go through, and the invoice was canceled immediately. Our investigation found no evidence of a platform-wide security issue. The compromise appeared to stem from your API keys, which we communicated to you along with recommendations to secure your systems. Unfortunately, we didn’t receive further communication from you after that.

We take security very seriously at MailerSend and remain committed to ensuring the safety of all users’ accounts. If you’d like to discuss this further, don’t hesitate to reach out.

Rated 5 out of 5 stars

Great product and great service over 2 years so far

I've been using MailerSend Free plan for about 2 years on a few websites - and since it hasn't missed a beat and have different needs now, I looked at upgrading.

I had some outside-the-box questions - support got back to me pronto, and Glenn answered and gave extra info I wouldn't have thought to ask.

All this helped me be able to decide if their service was going to meet my needs. Yep, it seems it will - so I upgraded.

December 30, 2024
Unprompted review
Rated 5 out of 5 stars

Best mail delivering service so far

Very good tool, it took me just one day to learn how it works and get it actually working on production. The interface is so clean and every text and button is exactly where expected. Of course, it works fantastic and mails are delivered inmediately and the way they're configured (conditional statements saved my life, no need to create lots of templates). The API documentantion is also fantastic. Plus, the support team is really fast and gives very understandable explanations that can be used and they work! 10 out of 10.

December 21, 2024
Unprompted review
Rated 1 out of 5 stars

Don't waste your time with MailerSend - they are known for arbitrary account suspensions

I previously had an account with mailersend with no issues, then our company got acquired, so we closed the previous account and opened a new one with the new company name. We applied for approval, but it was rejected, so we applied again with more information, we were surprised that the account got suspended with the following message "We have not been able to determine that your account fully complies with our policies and community standards." Although we provided a screenshots from our previous account but still we got suspended regardless. Don't waste your time, they are clearly incompetent. You might have your account suspended in the middle of a big marketing campaign. They will just cite their bullsh!t "polices and community standards", so avoid using them at all costs.

December 16, 2024
Unprompted review

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