Auto setup email forwarding.

## Radboud
Source:
https://www.ru.nl/ict/medewerkers/mail-agenda/handleidingen/instellen-uitgaande-mailserver-authenticated/#h5c527525-6fc5-69a8-722d-08089e4ae9d5

Name:
```

```
Gebruikersnaam:
```
.@ru.nl
```
Wachtwoord:
```

```

Protocol:
IMAP
Incoming server:
```
outlook.office365.com
```
port:
```
993
```
encrypted connection
```
SSL/TLS
```
Auth:
```
OAUTH2
```
username:
```
.@ru.nl
```

Outgoing server:
```
smtp.office365.com
```
port:
```
587
```
encrypted connection:
```
STARTTLS
```
Auth:
```
OAUTH2
```

## Delft:
Name:
```

```
Gebruikersnaam:
```
.@student.tudelft.nl
```
Wachtwoord:
```

```

Protocol:
```
IMAP
```
Incoming server:
```
outlook.office365.com
```
port:
```
993
```
encrypted connection
```
SSL/TLS
```
Auth:
```
OAUTH2
```
username:
```
.@student.tudelft.nl
```

Outgoing server:
```
smtp.office365.com
```
port:
```
587
```
encrypted connection:
```
STARTTLS
```
Auth:
```
OAUTH2
```
(Requires manual permission of admin).
```

Review issue #51's Radboud and Delft IMAP/SMTP requirements, then inspect the Ubuntu 20.04 setup entry point in the repository. Determine how email forwarding is currently configured and what OAuth2 and Delft admin-permission constraints apply. Done means the setup handles the requested provider settings without requiring undocumented manual steps.

Written by the indexing model from the issue text.