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Legacy Forums => General Discussion (Legacy) => Topic started by: russs on February 02, 2006, 04:45:12 PM

Title: Mail server setup
Post by: russs on February 02, 2006, 04:45:12 PM

Hi Guys,

I have now setup from scratch SME7 Pre1 and as I expected, another solid version of SME which I have used since 5.6 and never lost faith in!
Enough creeping now!

I am running OpenXchange on a Suse SLES9 server behind our SME 7 webserver and gateway. I want to use Openxchange as intended ( a fully featured IMAP server ), however I want people to be able to collect their mails from home. For this I of course want to use the far more secure SME 7 server.
To allow this I have to re-direct Horde to see the IMAP mailbox on the OX (Openxchange) server and am assuming this is a slight hole in my network security.
Having transferred from another Windows based mailserver to OX on Suse I have also discovered that the Spam checker on OX is not that good and by default it does not check for Viruses.
Because of these conclusions, I would really like to let SME handle the incoming mail through IMAP because it does a far better job of handling the mail. At the moment I have it set to pass all mail on to the internal OX server bypassing the SME server for incoming mail.

If I was to setup all the users from the OX server on the SME server and allow those mailboxes to collect mail, how easy would it be to then pass the mail on to the correct mailboxes on the OX server? Would it simply be a case of forwarding all mail from each individual users account on to the OX server? Would this cause a massive increase in network traffic and would the OX IMAP server (Cyrus based) except the mail correctly this way?
I want ot keep using the Openxchange IMAP interface for my users as it looks better than the Horde one and is already a fully featured Groupware suite which we paid.

Am I talking sense, basically it comes down to this, mail handled by the SME server and passed on to OX or mail bypassing the SME server and going straight to OX?

Thanks

Title: Mail server setup
Post by: tandum on February 03, 2006, 05:04:39 PM

Russs,
Changing the delegate mail server setting under "EMail / Change EMail delivery settings" in the SME7 server-manager, to point at your OpenXChange box will pass mail to the other box.

I doubt the mail will be pre processed by qpsmtdp on the SME box as the qpsmtdp process normally sits on port 25 and rejects mail for invalid users as well as scanning for spam etc. If you delegate mail, qpsmtdp wouldn't know if a user was invalid or not so I suspect they would port forward port 25 to the other box.

But I might be wrong. Try it and check the logs on the SME box.

Title: Mail server setup
Post by: CharlieBrady on February 03, 2006, 06:13:05 PM

Quote from: "tandum"

I doubt the mail will be pre processed by qpsmtdp on the SME box as the qpsmtdp process normally sits on port 25 and rejects mail for invalid users as well as scanning for spam etc. If you delegate mail, qpsmtdp wouldn't know if a user was invalid or not so I suspect they would port forward port 25 to the other box.

But I might be wrong.

You are. Mail is processed by qpsmtpd, but the recipient check isn't done.

Title: Mail server setup
Post by: russs on February 03, 2006, 06:31:49 PM

Thanks Guys.

So when you say it is 'pre-processed' does that mean it is Virus and Spam checked too?
If so then i'm happy to continue delegating the job to the OX server. I just wasn't sure to what extent the 'Delegate mail servers' went.

Thanks again