Am 25.09.2012 23:34, schrieb Marc Perkel:

Just wondering - is there any way for a dovecot server to authenticate against a different IMAP server?

Here's what I'm thinking. I run a spam filtering service and thinking about a way to give users access to their stored spam on my servers. However real email is forwarded to their server, So I'm wondering if I can configure dovecot somehow to do a back end authentication to their email account to gain access to their spam.

Open to suggestions

i am not sure your idea is the best way to goal your target, running a i.e amavis filter gateway before postfix with some style of quarantaine seems to me a better idea

however

sasl can do auth against imap i.e ( attention examples may be outdated or different by other distro config style and/or dovecot versions)

MECH=”rimap” FLAGS=”-O imap.server.name”

http://blog.travisz.com/2010/12/17/debian-mail-server-with-postfix-dovecot-a...

#vim /etc/dovecot/dovecot.conf

Look for a line that starts with “auth default”. Once you fine that line, insert the following:

auth default {
mechanisms = plain login
passdb pam {
}
userdb passwd {
}
socket listen {
client {
path = /var/spool/postfix/private/auth
mode = 0660
user = postfix
group = postfix

there might better possibilities, wait until more response from the list

-- Best Regards MfG Robert Schetterer