To access your mail over web, go here.
To use an external email client (such as Thunderbird), use the following details:
SMTP:
Host: mail.tardisproject.uk
Port: 587
Security: STARTTLS
Username: <username>@tardisproject.uk
IMAP:
Host: mail.tardisproject.uk
Port: 143
Security: STARTTLS
Username: <username>@tardisproject.uk
Alternatively, if you're using Outlook on mobile or desktop, use the following details:
Type: Exchange
Server: webmail.tardisproject.uk
User: username@tardisproject.uk