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Hello all,
Finally , I received the green flag to migrate my Windows 2003 domain to a new ClearOS system :)
I'm goind to use my COS Server as a gateway. My only problem concerns mails and publishing servers .. about the mails, here's what I'd like to do but I dont know if it's possible :
We actually have a Zimbra mail server and we would like to keep it. So, I'd like to use ClearOS Gateway to receive emails, check the spams and virus with the provided tools finaly send the mails to my Zimbra.
I've a fix IP Address (the WAN port of my ClearOS system) and the MX records point to it.
Is is possible to to that ? I saw the other posts about forwarding emails to another server but nothing about the spams and viruses...

thanks for your help :)
Friday, March 17 2017, 08:07 PM
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  • Accepted Answer

    Monday, March 20 2017, 08:58 AM - #Permalink
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    Arnaud Forster wrote:

    Thanks very much Nick , will try that :)
    As I'm not a guru configuring mail servers and for my own understanding , I was wondering, when my COS receives an outgoing email, how he knows where it should send it .. ist it just going to contact the gateway of my provider and send it without any special configuration ?
    Thanks to all :)
    By default, COS will send the mail directly to the recipient designated by the MX record from the bit after the @ in the e-mail address. This is generally fine if your ISP allows it and you have a fixed IP with a PTR/Reverse DNS record. It will only relay via your ISP if you have configured them as a Relay Host in your SMTP Server settings (or manually if they require authentication). I have to relay as I technically have a dynamic IP (which has not changed for years) so I appear on dynamic IP blocklists. Some mail servers will use such blocklists to reject mail.
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  • Accepted Answer

    Monday, March 20 2017, 06:38 AM - #Permalink
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    Thanks very much Nick , will try that :)
    As I'm not a guru configuring mail servers and for my own understanding , I was wondering, when my COS receives an outgoing email, how he knows where it should send it .. ist it just going to contact the gateway of my provider and send it without any special configuration ?
    Thanks to all :)
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  • Accepted Answer

    Saturday, March 18 2017, 07:06 PM - #Permalink
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    Arnaud Forster wrote:
    If I can... for outgoing emails, do have I to send them from my Zimbra to ClearOS which will forward them automatically further ?
    Thanks again :)
    It is up to you. I presume you can configure Zimbra to relay via ClearOS but it can also send directly. It is the same as with e-mail clients which can either send directly or through ClearOS.
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  • Accepted Answer

    Saturday, March 18 2017, 06:18 PM - #Permalink
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    Thanks very much :) I'll try that next week :)

    If I can... for outgoing emails, do have I to send them from my Zimbra to ClearOS which will forward them automatically further ?
    Thanks again :)
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  • Accepted Answer

    Friday, March 17 2017, 10:15 PM - #Permalink
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    See this doc.
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