What's the point of the tab "Personalities" in Outlook configuration in they don't show up at the time of sending a mail?
The only way I found is to show the "From" field and fill manually every time the account I would like to send as.

Sending as a distribution list works fine in web access but is broken in Outlook:
I instantly get back a bounce:

Errore: Impossibile inviare il messaggio.
Oggetto: asd
A: zimbra02@gruppoapra.it

Nota - Errore SOAP. Crea di nuovo il messaggio e reinvialo. Seguono i dettagli:
Codice di errore: account.NO_SUCH_ACCOUNT
Testo dell’errore: no such account: everyone@gruppoapra.it

With a error_report.xml attached:
- <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope">
- <soap:Body>
- <soap:Fault>
- <soap:Code>
- <soap:Reason>
<soap:Text>no such account: everyone@gruppoapra.it</soap:Text>
- <soapetail>
- <Error xmlns="urn:zimbra">

Thanks in advance