If that query works, I would try one very similar to the one used by the Exchange and auth integration (watch out for line breaks in the forum version; there shouldn't be any in the command):

ldapsearch -h <hostname> -D "administrator@mydomain.dom" -W -s sub -b "DC=mydomain,DC=dom" '(&(|(objectclass=user)(objectclass=contact)(objectclass=group))(proxyAddresses=smtp:*))'

Notice that here I am trying to bind as administrator (-D <id>). Information regarding all your users should be displayed. If you'd like to cut down the output slightly use:

ldapsearch -h <hostname> -D "administrator@mydomain.dom" -W -s sub -LLL -b "DC=mydomain,DC=dom" '(&(|(objectclass=user)(objectclass=contact)(objectclass=group))(proxyAddresses=smtp:*))' dn

Once that query is executing successfully, you should try it as a less privileged user and check that it still works as well.

Please tell me how this goes for you, or if there is any additional information I can provide. I’m pleased to help.

2. The main reason I am running mail server, is because my previous provider was losing "ham" mails for me, as well as the spam! Therefore I want to be able to whitelist certain sending addresses and also certain domains. Is this possible please, and how is it done?

Yes, but not through an automated mechanism. To do so, you need to add a whitelist map for Amavis. Check out http://www.ijs.si/software/amavisd/amavisd-new-docs.html for some good info. The documentation provides the proper information, but the basic idea is pretty simple, a list of e-mail addresses or partial addresses, one per line. If soft white listing (score_sender_maps), it is an address followed by white space and then the score.

3. In the viewer, I set up a new user called "postmaster" using the Vadmin account, however, it says Bad Username or Password when I try to login? I tried setting up another, with the same problem, what may I have done wrong?

Yes, I have an idea. I have introduced a bug in a very recent update where the password was no stored correctly when adding a new user. It is set correctly if you change the user’s password. I have fixed the issue, and will include it in the next update.

4. Is there anyway using the viewer to "release" a quarantined e-mail and have it sent on to the recipient, with an option to whitelist sender?

Perhaps. I have checked into it as it was one the initial requirements I listed when designing the product. This is actually much more difficult than one would expect. The reason is that since the mail has already been delivered, the true information on where it was coming from and where it was going that is part of the SMTP transaction is gone. There are a couple of ways around this, one of which would be to use a BSMTP transport for Amavis. That is a significant change to the workings, however. Another is to execute amavis-release on the appropriate message. I have worked on something to that end, but I am not ready to include it in the base product as yet. If you are interested I can send you some details. My second best solution to this problem was the download link that downloads the message in rfc822 format, which most, though admittedly not all, e-mail clients can handle and open.

5. In addition to 4 above, perhaps for SPAM mails that have been classified in the maybe, maybe not category (rating 6.31 to 15...), could the user also get notified of the quarantined mail, with a link to a webpage to giving an option to delete or release?

Possibly, this is a little tricky however, as it is really more on the delivery side than on the viewer side. Something might be possible to work out, but I would need to think on it.

6. And finally for now, is there any way of having statistics presented on a webpage, such as number of spam and/or virus e-mails blocked by domain, by day? Also, number of messages passed. And perhaps extra details by sender and recipient address?

Like number 5, this is a more on the delivery side, but I think it is an excellent idea. I’ll definitely be looking into ways to do this, but I can’t make any positive commitments as to when it would be ready.

Sorry for such a long list, but I'm so enthusiastic about this, I'd like to make maximum use of the tool. Hope I'm not asking too much.

My pleasure! I hope it works well for you!