Hello,
I understand that you would like to install Iredmail and integrate email with sendy I shall definitely help you in setting up the setup. We have used various mail server and posted various articles in our blog. You can check out the same from our blog.
===
[login to view URL]
===
The iredmail is something new to us and I have gone through the installation and its easy for me to configure on your server.
I will be available between 9:00 AM IST to 9:00 PM IST. If requires, will be available on off working hour as well.
Ping me incase if you have any queries.