Not recommended
Mixed experience. I signed up for their Easy platform 4-5 months ago and bought iRedMail Pro, paid ca $1000 in total (yearly subscription). iRedMail Pro has a nice GUI, I have no complaints about it. However, the support (iRedMail Easy service) is sometimes very quick to react (first response in 30 minutes or less), but sometimes is not adequate.
For example, when I asked their support team about a signle configuration option in their system (something about postfix configuration, won't dig into the details here), I got the reply that contained the following text:
"Currently your tickets is about 90% of all my ticket workload. :)"
My question was NOT properly answered, the support staff only suggested me to compare config files myself, and after asking the same questions 2 times they were still unable to assist me. Wouldn't it better just to reply me with a real solution to the problem? Honestly I don't care how much % of their ticket workflow my tickets take.
For the most of the time, you won't get a normal and polite customer support from iRedMail. Don't expect them to start replying to you by even saying "Hello" (approx 1 in 10 times they actually said 'Hi' to me). Usually it will be just a one-line reply containing a link to the docs or a small text like "read the docs". Also, if you ask more than 1 question in the ticket, they will randomly reply to only one of them. It seems like sometimes its a bit hard for them to calculate the number of question marks in the support request.
I would not recommend iRedMail Easy because of the support. If you have a critical problem, you create a new ticket, and they might reply something like "Teaching and training costs me too much time and workload, It’s not what I expect and want".
This style of support sometimes becomes quite useless because there is no point to create tickets if they reply this way. I consider the support as non-existent when support tech just says "read the docs" or start complaining that I create too many tickets that they can't handle.
I understand that iRedMail is a 1 or 2 man show, they don't have enough time to deal with their customers (despite this is a paid service), and that results in poor customer service.
In my opinion it is NOT worth the money. I will never pay $50/mo again for this type of support. Better sign up an Exchange Online plan for $4-6/mo and get a real 24/7 support from Microsoft that won't complain that you take too much of their valuable time.