[Dovecot] Can't connect to auth server

[Phill Edwards]

>>> - Getmail destination section looks like this:
>>>     [destination]
>>>     type = MDA_external
>>>     path = /usr/libexec/dovecot/deliver
>>>     arguments = ("-d", "maildb")
>
>>> It's true that I don't have a file called auth-master. I guess I
>>> should have but until I started this dovecot-sieve work it was never a
>
> See http://wiki.dovecot.org/LDA
>
> "-d <username>: Destination username. If given, the user information is
> looked up from dovecot-auth."
>
> You need Dovecot running and providing the auth socket, see
> http://wiki.dovecot.org/MainConfig?highlight=auth-master

Thanks for your reply, but I still don't understand how to fix my
issue. I had a look at the wiki page and it says: "auth_socket_path =
/var/run/dovecot/auth-master
    UNIX socket path to master authentication server to find users."

The file auth-master doesn't exist anywhere on my system, and the wiki
doesn't tell me how to create it or what its contents should look
like. So I still don't understand how I make dovecot provide the auth
socket.

Regards,
Phill