[Dovecot] Disallow POP3 from deleting messages

[DormitionSkete@hotmail.com]

I'd like to use Dovecot as our IMAP server when our users are within our LAN, but I'd also like to give them the ability to access their emails via POP3 when they are outside the LAN.  I know most POP3 clients will give their users the option of not deleting the messages from the server after they are downloaded, but is there any way to restrict them from being able to do so at the server level?

In other words, I want to disallow the server from accepting the DELE command from POP3 clients.

Is that possible?

We have some accounts that multiple users need simultaneous access to.  I don't want a user to decide to set up a POP3 account on his own on his iPad or something, and inadvertently blow the Inbox away for everybody else.

We have a satellite connection, so our upload speeds are real slow.  I think POP3 would give a lot better user experience than IMAP when they are outside the LAN.

Any help or advice will be greatly appreciated.

Peter, hieromonk

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Dormition Skete
 Monastery Website:  http://www.DormitionSkete.org
 Convent Website:  http://www.HolyApostlesConvent.org
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