Mailspring is a free local mail client if you are looking to connect to an individual Mailreef mailbox. Follow these steps below in order to get connected.
1. Download Mailspring and create your Mailspring ID
When you install Mailspring onto your computer, you will be prompted to create an ID with their service. You do not require their premium subscription.
2. Under the Add Mailbox Page, click on IMAP / SMTP
3. Enter in the email address and password of your Mailreef account
4. Enter in your Connection Information
And that's it! If you run into any authentication issues while connecting, please double check there are no additional spaces before or after any of your host or authentication information when copy and pasting.