Quickness and deliverability Mailersend is one of the best mass mail send in the current time. We are on the developing stage, and we put on competition almost 10 mass mail ESP, where we need test and to be sure that our transactional mails don't end up into our clients Spam box, or "Promotions" tab for google.. Mailersend was the winner, the second a client register into our system instantaneously the mail is in our clients Inbox (a lots of ESP endup into Promotion tab when it comes to google). I would recommand Mailersend for any one who wants a reliable, sure solution for mass mail sending. Also Mailsersend has one of the bets free plan offer in the market, over 12.000 mail/month, it is a must for a business to automate their mail sending machinery to send/try/experiment with that amount of mails/month after that upgrade to a paid plan (I would say most ESP average is 3000 mail/months which is not that much for tests).

Outstading passion for what they do! From an ecommerce company that has a revenue of near 15M a year, we like to work with partners that have passion for what they do, and that's exactly what MailerSend gave us. The commitment that they put in to fix an issue or to clarify a doubt every time we have one, is outstanding! Keep on going, MailerSend!

Horrible support and unjustified… Horrible support and unjustified account suspension although we never sent a single email trough their platform. We tried contacting support trough email two times and they never replied, also they blocked our access to live chat and the only contact option was their regular contact form on site. We tried contacting them again through the contact form and they replied that our account is suspended since it doesn't comply with the ToS ALTHOUGH upon registration I contacted live chat to ask if our use case is okay and they said we are 100% complying with their ToS but then suspend our account regardless. Worst service and customer support I have ever seen.

Great support! Great support! While trying to get my account approved, I was notified that instead, my account had been suspended. I sent an email to ask for clarification since I was sure that I was in compliance with the Terms and Conditions set by MailerSend. Glenn answered me and was helpful, knowledgeable, and kind through the whole process. Finally, we managed to get my account approved, and my address un-blocked.

Not complying... I filled all the fields, but: " After careful review, it has been determined that your account does not comply with our terms and community standards. Due to this, your account will not be approved. "