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Thread: Server keeps deferring mail unable to find MX of other hosts

  1. #1
    SinisterMoose is offline Junior Member
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    Default Server keeps deferring mail unable to find MX of other hosts

    Okay, I'm sure I've got something out of whack.

    CentOS 5 server, latest ZCS.

    I manage the DNS through another server, (same network) and currently have everything pointing to the ZCS server.

    I can send mail to any of the users, however they can't send mail out of ZCS because the server defers it with the notice:
    "host or domain name not found name service error for name=gmail.com type=MX: host not found, try again"

    It's acting like it can't do DNS look up, or MX look up for gmail.com or any outside domain for that matter.

    I don't want a subdomain in front of the domain in the mail addresses: the e-mail addresses have to look like first.last@domain.com

    The default domain in the Zimbra Admin Control Panel, is set to "domain.com" without the quotes, I'm not comfortable showing the real domain name.

    The Web mail MTA Hostname is showing "mail.domain.com" in the global settings, with out the quotes.

    In Configuration > Servers > domain.com > general information tab >
    Display Name: domain.com
    Service host name: domain.com

    In In Configuration > Servers > domain.com > MTA tab >
    Web mail MTA Hostname: mail.domain.com
    MTA Trusted Networks: 127.0.0.0/8 72.xxx.xxx.154/32 72.xx.xxx.50/31

    On the DNS Server at IP 72.xx.xxx.50:

    72.233.36.154 / 24 PTR domain.com.
    ftp.domain.com. CNAME domain.com.
    mail.domain.com. A 72.xxx.xxx.154
    domain.com. NS ns1.hiddenforsafety.com.
    domain.com. NS ns2.hiddenforsafety.com.
    domain.com. A 72.xxx.xx.154
    domain.com. MX (10) mail.domain.com.
    webmail.domain.com. A 72.233.36.154
    Register a Domain, Find Hosting and Create a Website | Domain.com. CNAME domain.com.

    ----

    Any idea what I'm missing and why it would continue to defer mail sent to other domains?

  2. #2
    phoenix is offline Zimbra Consultant & Moderator
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    Default

    Post the output of the following commands run on the Zimbra server:

    Code:
    cat /etc/hosts
    cat /etc/resolv.conf
    dig yourdomain.com any
    dig yourdomain.com mx
    host `hostname`  <-- use that exact command with backticks not single quotes.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
    SinisterMoose is offline Junior Member
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    Default

    From hosts:
    # Do not remove the following line, or various programs
    # that require network functionality will fail.
    127.0.0.1 localhost.localdomain localhost
    72.xxx.xx.154 mail.domain.com mail
    :1 localhost6.localdomain6 localhost6

    ----
    From resolv.conf
    nameserver 72.xx.xxx.50
    nameserver 72.xx.xxx.51
    domain ns1.mydnsserversdomain.com

    ----
    from dig domain.com any
    ; <<>> DiG 9.3.4-P1 <<>> domain.com any
    ;; global options: printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19070
    ;; flags: qr aa rd; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 3

    ;; QUESTION SECTION:
    ;domain.com. IN ANY

    ;; ANSWER SECTION:
    domain.com. 86400 IN MX 10 mail.domain.com.
    domain.com. 86400 IN SOA ns1.mydnsserversdomain.com.
    domain.com. 86400 IN NS ns2.mydnsserversdomain.com.
    domain.com. 86400 IN NS ns1.mydnsserversdomain.com.
    domain.com. 86400 IN A 72.xxx.xx.154

    ;; ADDITIONAL SECTION:
    mail.domain.com. 86400 IN A 72.xxx.xx.154
    ns1.mydnsserversdomain.com. 86400 IN A 72.xx.xxx.50
    ns2.mydnsserversdomain.com. 86400 IN A 72.xx.xxx.51

    ;; Query time: 1 msec
    ;; SERVER: 72.xx.xxx.50#53(72.xx.xxx.50)
    ;; WHEN: Mon Jul 6 13:35:38 2009
    ;; MSG SIZE rcvd: 234

    ----

    from dig domain.com mx
    ; <<>> DiG 9.3.4-P1 <<>> domain.com mx
    ;; global options: printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32972
    ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3

    ;; QUESTION SECTION:
    ;domain.com. IN MX

    ;; ANSWER SECTION:
    domain.com. 86400 IN MX 10 mail.domain.com.

    ;; AUTHORITY SECTION:
    domain.com. 86400 IN NS ns2.mydnsserversdomain.com.
    domain.com. 86400 IN NS ns1.mydnsserversdomain.com.

    ;; ADDITIONAL SECTION:
    mail.domain.com. 86400 IN A 72.xxx.xx.154
    ns1.mydnsserversdomain.com. 86400 IN A 72.xx.xxx.50
    ns2.mydnsserversdomain.com. 86400 IN A 72.xx.xxx.51

    ;; Query time: 1 msec
    ;; SERVER: 72.xx.xxx.50#53(72.xx.xxx.50)
    ;; WHEN: Mon Jul 6 13:39:59 2009
    ;; MSG SIZE rcvd: 149

    ----
    from host `hostname`

    domain.com has address 72.xxx.xx.154
    domain.com mail is handled by 10 mail.domain.com.

  4. #4
    veronica is offline Outstanding Member
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    Default

    Do you have "enable DNS lookup" checked ?

  5. #5
    SinisterMoose is offline Junior Member
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    Default

    Quote Originally Posted by veronica View Post
    Do you have "enable DNS lookup" checked ?
    Yes, in Global Settings under the MTA tab.

  6. #6
    SinisterMoose is offline Junior Member
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    Quote Originally Posted by veronica View Post
    Do you have "enable DNS lookup" checked ?
    As well as:
    Configuration > Servers > domain.com > MTA Tab:
    Dns Look up is enabled.

  7. #7
    veronica is offline Outstanding Member
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    from MTA server try running :
    dig gmail.com MX

    Does it gives you MX values ?

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