You can easily setup your AcropolisMail accounts in your iPhone and synchronize all your email in your device.
To doing so, go to your iPhone Settings > Account & Passwords >> Add Account
Then on the list of email providers, select Other.
On the next page, tap on Add Mail Account.
Then you will be asked to enter all your email service information.
Fill the fields like the bellow picture.
Incoming and outgoing mail server hostname both should be webmail.cloudacropolis.com
You should enter your complete email address and password.
After completing all the fields, it will verify the settings and start syncing your mailbox on the device.