Most mail apps set themselves up from your address: type your email and your app password (not your MyBoudica password). Ask your administrator for an app password for each device.
Then open Settings, tap Profile Downloaded, install it and enter your app password.
| Server | Port | Security | |
|---|---|---|---|
| Incoming (IMAP) | mail.myboudica.com | 993 | SSL/TLS |
| Outgoing (SMTP) | mail.myboudica.com | 465 | SSL/TLS (or 587 STARTTLS) |
User name: your full email address. Password: your app password.