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Thread: Zimbra mail access from anynetwork from anywhere from any mail-client software

  1. #1
    rakeshkumarc0 is offline Member
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    Exclamation Zimbra mail access from anynetwork from anywhere from any mail-client software

    Dear Team,

    We are facing a problem in implementing our zimbra mail server as accessible from anynetwork from anywhere from any mail-client software. We are using Zimbra Release 7.0.0_GA_3077.RHEL5_64_20110127201852 CentOS5_64 FOSS edition. Currently the zimbra mail server is at public ip & has not associated with any any private ip.

    We want to use it from anynetwork from anywhere from any mail-client software say if some one travelling & using data-card, then the mails should be come & go as usually. please help us as soon as possbiel because we are completly stuck & helpless.

  2. #2
    quanah is offline Zimbra Employee
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    You would need to provide better details on what problems you are having. For example, are you unable to connect to the SMTP ports? Are you unable to connect to the web client ports? etc.
    Quanah Gibson-Mount
    Server Architect
    Zimbra, Inc
    --------------------
    Zimbra :: the leader in open source messaging and collaboration

  3. #3
    rakeshkumarc0 is offline Member
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    Dear Quanah,

    Actually, we have zimbra mail server installed with public ip & it is placed before firewall because earlier we tried to put our zimbra mail server into DMZ zone & we found that mail were not coming & were not getting delivered. The SMTP port which we use is standard port no 25 & inside the lan, we can connect to zimbra's mail server pop3 port no 110 & smtp port no 25 through Evolution/Thunderbird/Endura through its account settings. Our senior management teams have Microsoft Outlook with VPN & for their VPN's IP we have created certain rules in our firewall to access the mails through OUTLOOK or through any other mail-client softwares.

    Now the problem arises when these people travels from one ip network to another network & when they use their USB Net Data Card, they are not able to access the mails due to automatic IP assisgnment through Net Data Card ISP Provider. We want to allow access to our zimbra mail server from any network from anywhere from any mail-client just we use gmail or yahoo or reddiff without setting ip or through some external relay agent as we use in cyber-cafe just open the gmail.com,,put username & password & the work goes on whatever the ip network may be.

    We are helpless at present & we have to implement it at immediately basis. Any kind of assistance would be greatly appriciated Quanah.

    Regards
    Rakesh Kumar

  4. #4
    phoenix is offline Zimbra Consultant & Moderator
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    If you have your server on a public IP then there is no restriction in ZCS that would prevent anyone connecting to your server from any network in the world. Are the users connecting to the correct Submission port 587 to send mail? Are they using POP or IMAP and if so, which ports are they using? Do you actually have a firewall on the Zimbra server? IF you don't then this would be a high security risk. If you do have a firewall enabled, do you have the correct ports open? Is it the users inside your LAN that can't connect to the server? What's wrong with placing the server on your LAN?
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  5. #5
    rakeshkumarc0 is offline Member
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    Dear Bill,

    1. Zimbra Server is on Public IP.
    2. Users normally use port no 25 to send mails
    3. Users are using POP3 with port no 110
    4. there is not any firewall on the zimbra server
    5. Inside the LAN, all users can connect

    Main problem arises when people use mail-client through net data card because it generates automatic ip which is not possible to register every time for each travelling user..

    For example, as we open gmail.com

  6. #6
    phoenix is offline Zimbra Consultant & Moderator
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    Quote Originally Posted by rakeshkumarc0 View Post
    1. Zimbra Server is on Public IP.
    2. Users normally use port no 25 to send mails
    That is the incorrect port to send email, your users should send mail through port 587 (the correct Submission port and requires authentication).

    Quote Originally Posted by rakeshkumarc0 View Post
    3. Users are using POP3 with port no 110
    4. there is not any firewall on the zimbra server
    This is a security disaster waiting to happen, you need to do something about it.

    Quote Originally Posted by rakeshkumarc0 View Post
    5. Inside the LAN, all users can connect
    Good.

    Quote Originally Posted by rakeshkumarc0 View Post
    Main problem arises when people use mail-client through net data card because it generates automatic ip which is not possible to register every time for each travelling user.
    I don't understand what you mean by that statement. I can connect to my server from any IP address whether I'm in an internet cafe or via a mail client on a remote telephone network (via my Mobile phone), I can do this without restrictions and without making any modifications to my Zimbra server.

    Quote Originally Posted by rakeshkumarc0 View Post
    For example, as we open gmail.com
    My server works exactly like that.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  7. #7
    rakeshkumarc0 is offline Member
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    Dear Bill

    Our requirement is just ""Senior people can send mails to other domain (other than own domain) when outside the Network.
    Say if someone traveling and using Data Card or at home can send mails using their zimbra mail ID and SMTP (Outlook) to other domains without changing the mail-client settings.

  8. #8
    phoenix is offline Zimbra Consultant & Moderator
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    Quote Originally Posted by rakeshkumarc0 View Post
    Our requirement is just ""Senior people can send mails to other domain (other than own domain) when outside the Network.
    This seems to be a change from your original question in your first post.

    We want to use it from anynetwork from anywhere from any mail-client software say if some one travelling & using data-card, then the mails should be come & go as usually.
    You also haven't answered my comment about the highlighted text in your previous post.

    Quote Originally Posted by rakeshkumarc0 View Post
    Say if someone traveling and using Data Card or at home can send mails using their zimbra mail ID and SMTP (Outlook) to other domains without changing the mail-client settings.
    They should always use port 587 for sending email not port 25.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  9. #9
    rakeshkumarc0 is offline Member
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    Dear Bill

    how can some senior people can use zimbra mail clients for example OUTLOOK when they are traveeling from one ip network to another ip network using data card & the answer to the highlighted text is "we have senior people with vpn access & their ip is registered with our firewall" but in the case of data card, the ip changes & they are not able to access the mail using OUTLOOK & this creates a problem for us to sort-out

  10. #10
    quanah is offline Zimbra Employee
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    As long as the email client is *correctly* configured to use a secure port for email submission (Either port 465 or port 587), it does not matter where in the world they are, or what IP address they have.
    Quanah Gibson-Mount
    Server Architect
    Zimbra, Inc
    --------------------
    Zimbra :: the leader in open source messaging and collaboration

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