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Thread: [SOLVED] New to Zimbra having DNS issues

  1. #1
    Join Date
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    Default [SOLVED] New to Zimbra having DNS issues

    Hi Folks,
    I recently signed up to a paid dyndns service so I could setup my domain email at home (my ISP wont give out non business plan static ip addresses).

    To cut a long story short I am behind a NAT firewall and have followed the Split DNS guide from Zimbra 4.5 - Ubuntu Egdy Server 6.10 Install | Tickus.

    I have the mail server up and running but I must have mis configured something wrong in my BIND9 setup as now I have email addresses such as blah@mail.blah.com rather than blah@blah.com.

    Could someone tell me where I went wrong ?

    Here is my DNS config:

    Zone.db
    Code:
    ;
    ;        Addresses and other host information.
    ;
    @        IN        SOA     mail.blah.com. hostmaster.mail.blah.com.$
            10118          ; Serial
            43200          ; Refresh
            3600           ; Retry
            3600000        ; Expire
            2592000 ) ; Minimum
    
    ;        Define the nameservers and the mail servers
     IN        NS         192.168.1.110           ; local ip
     IN        A          192.168.1.110           ; local ip
     IN        MX         10  mail.blah.com. ;MXrecord
    host mail.blah.com
    Code:
    mail.blah.com has address 192.168.1.110
    mail.blah.com mail is handled by 10 mail.blah.com.
    /etc/hosts
    Code:
    127.0.0.1	localhost
    192.168.1.110	mail.blah.com mail
    /etc/resolv.conf
    Code:
    nameserver 192.168.1.110 ;local ip of zimbra server
    hostname -f
    Code:
    mail.blah.com
    I am forwarding as suggested to up my ISP's upstream DNS servers. I have an mx record pointing to mail.blah.com from dyndns.

    dig mx mail.blah.com
    Code:
    ; <<>> DiG 9.4.2-P1 <<>> mx mail.blahn.com
    ;; global options:  printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6833
    ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1
    
    ;; QUESTION SECTION:
    ;mail.blah.com.		IN	MX
    
    ;; ANSWER SECTION:
    mail.blah.com.	2592000	IN	MX	10 mail.blah.com.
    
    ;; AUTHORITY SECTION:
    mail.blah.com.	2592000	IN	NS	192.168.1.110.mail.blah.com.
    
    ;; ADDITIONAL SECTION:
    mail.blah.com.	2592000	IN	A	192.168.1.110
    
    ;; Query time: 26 msec
    ;; SERVER: 192.168.1.110#53(192.168.1.110)
    ;; WHEN: Mon Oct 13 21:38:45 2008
    ;; MSG SIZE  rcvd: 97
    host mail.blah.com
    Code:
    mail.blah.com has address 192.168.1.110
    mail.blah.com mail is handled by 10 mail.linuxspawn.com.
    Anyone know if this is a local DNS or if I have mis configured my dyndns account. Any help would be great and I mean any... I can provide any details necessary, I have been hitting my head against the wall for a couple of days now

    Thanks in advance.

  2. #2
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    Default

    Your domain appears to be mail.blah.com instead of blah.com.

  3. #3
    Join Date
    Mar 2006
    Location
    Massachusetts
    Posts
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    Default

    This might not be a DNS issue. By default, when you install Zimbra it will setup the email domain as the FQDN of your server. You need to go into the configuration, when given the option during the install, and change it from 'server.domain.com' to 'domain.com'.

  4. #4
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    Default

    Thanks Ill give the install option a go and see what happens.

  5. #5
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    Ok I changed the created domain from the install menu from mail.blah.com to blah.com. I have logged into my admin mailbox and the admin console for testing.

    I have sent a message out of the admin mailbox to my work account and visa versa but so far nothing has gone through the mail queue.

    I have not received a bounce back for either message although when I look at the mail queue at the top level it shows a RED number 1 under but not directly under the Deferred column.

    I just checked again and I am getting no route to host error messages for outbound mail and nothing at all for incoming mail (i have all the required ports open on the router)

    I noticed also that its resolving the recipients mailserver ip address correctly ?
    Last edited by sil3nt; 10-13-2008 at 09:21 PM.

  6. #6
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    Default

    I solved the problem after investigating further I found that my ISP blocks port 25 on inbound and outbound connections. Logged into my account tools and disabled port blocking I can now send mail to and from OK.

    Although it sucks that so many isps bounce mail when it resolves to a dyndns host due to bad MTA rep, if half the mail I send gets blocked wtf is the point....

    sigh... thanks anyway guys for the help

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