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I'm trying to create a proxy using passwd files. Can I use the existing passwd files created by the system (ie passwd and shadow) or do I have to create new passwd files for the email proxy users? How would the passwd and shadow files for a proxy using passwd files look? I've tried the example on the wiki but I'm not getting anywhere, pop and imap requests are not getting sent to the other server.

I don't think existing /etc/password would work as extra fields may confuse the system.

You could try something like

passdb passwd-file { args = /etc/dovecot/proxied-users.%Ls }

passdb pam { }

which would check the for the username in proxied-users.imap or proxied-users.pop3 (depending on the protocol) first, then authenticate as usual (via PAM, say) if it isn't there. Then have lines like

username:::::::host=123.234.345.567 port=143 nodelay=n nologin=y proxy=y

in the proxied-users.imap file and the same with port=110 in the .pop3 file.

Best Wishes, Chris

Thanks Chris this pointed me in the right direction, and the proxy is now working. I didn't realize that the order of the passdb declarations mattered. Thanks again for your reply!

On Mon, 2006-10-23 at 22:14 +0300, Timo Sirainen wrote:

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which would check the for the username in proxied-users.imap or proxied-users.pop3 (depending on the protocol) first, then authenticate as usual (via PAM, say) if it isn't there. Then have lines like .. I don't think the PAM authentication is made though, but it probably doesn't matter since the remote server checks the password anyway?

Oh, that's what Chris said. Forget about this ;)