Not recommended First I wanted to connect Google Firebase to import authenticated users to mailersend. But the extension doesn't do anything, contacts still need to be imported manually. After trying to import contacts manually, mailersend tells me to upgrade because I cannot import users without credits. After upgrading, mailersend tells me that the subscription doesn't do anything for new contacts, but I need to buy credits to import them für 250$. After requesting mailersend to refund my money, they told me that they never refund money.

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).

Same as others, account suspended Same as others. Set up an account and configured wait list page to store email addresses and send thank you emails. Got hit by a bot over the Xmas period and account suspended due to high bounce rate. Added extra checks in to make sure email address has valid DNS, RFC compliant and Google ReCaptcha. Have tried multiple times to contact them but have no replies. Will look for a better alternative.

Great Tech Support Was able to open a ticket via chat and have the rep get back to me after the issue had been researched. Didn't have to waste an hour on chat like some other places that won't let you open up a ticket. The rep got back to me quickly with the correct information the first time.

Horrible Customer Service without Justification Upon attempting to contact their support team, not a single member would respond to assistance. Instead, they responded every time with an email stating, "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." There is no due reason that our platform does not comply with their Terms of Use and Policies and their denial to refuse service. Here's the timeline. Over the course of multiple attempts of trying to contact support, all the following occurred: - We have not sent a single email through their platform, yet the account was suspended - All domain and subdomain DNS records were verified (ie SPF, DKIM, bounce, return, updates) but the account never was - We did not receive a single email or contact method to a support staff member to verify our domain name - We provided them various forms of social media as they requested, resulting in no change of domain approval status - We provided 3 months of invoices from our existing email service, resulting in no change of domain approval status We did all they requested and they could not even respond to their decision. As a warning to future users, this company appears to bias their customers and decide to service them or not.