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Thread: Can't send mail to AOL

  1. #1
    huynguyengds is offline Intermediate Member
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    Default Can't send mail to AOL

    Hi All,

    I new member and new Zimbra.
    I can send mail to Yahoo,Hotmail, Gmail and other, but AOL can't.

    Reason: host mailin-03.mx.aol.com[64.12.138.153] said: 421-: (dns:b1) http://postmaster.info.aol.com/errors/554dnsb1.html 421 service not avaible (in reply to end of data command).

    I follow link http://postmaster.info.aol.com/errors/554dnsb1.html . AOL said I don't revDNS. But I check http://postmaster.info.aol.com/tools/rdns.html


    HTML Code:
    RDNS Results
    DNS Server Response:
    mail.mydomain.com
    Success! It appears you have Reverse DNS. Please note the following points:
        * If the sender's domain is the only domain sending mail from a specific IP address, we recommend that the reverse DNS entry (PTR Record) match the domain name (A Record), but we do not require it.
        * AOL does require that all connecting Mail Transfer Agents have established reverse DNS, regardless of whether it matches the domain.
        * Reverse DNS must be in the form of a fully-qualified domain name. Reverse DNSes containing in-addr.arpa are not acceptable, as these are merely placeholders for a valid PTR record. Reverse DNSes consisting only of IP addresses are also not acceptable, as they do not correctly establish the relationship between domain and IP address.

    When I use dig command

    HTML Code:
    abc@man-nyu:~$ dig -x 123.30.65.25
    
    ; <<>> DiG 9.5.1-P2 <<>> -x 123.30.65.25
    ;; global options:  printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64738
    ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
    
    ;; QUESTION SECTION:
    ;25.65.30.123.in-addr.arpa.	IN	PTR
    
    ;; ANSWER SECTION:
    25.65.30.123.in-addr.arpa. 86400 IN	PTR	mail.mydomain.com.
    
    ;; AUTHORITY SECTION:
    30.123.in-addr.arpa.	81441	IN	NS	hcm-server1.vnn.vn.
    30.123.in-addr.arpa.	81441	IN	NS	vdc-hn01.vnn.vn.
    
    ;; ADDITIONAL SECTION:
    vdc-hn01.vnn.vn.	79518	IN	A	203.162.0.11
    hcm-server1.vnn.vn.	79926	IN	A	203.162.4.1
    
    ;; Query time: 38 msec
    ;; SERVER: 192.168.0.1#53(192.168.0.1)
    ;; WHEN: Tue May  5 18:46:33 2009
    ;; MSG SIZE  rcvd: 164
    Look like I have revDNS.
    Help me to fix this issue, pls.

    Regards

  2. #2
    uxbod's Avatar
    uxbod is offline Moderator
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    Welcome to the forums

    The hostname that your ZCS installation provides via the 220 HELO is different from your MX record. How did I tell that ? Well, if you have changed your domain name in the post but not the IP address

  3. #3
    huynguyengds is offline Intermediate Member
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    Hi uxbod,

    Many thanks for quickly reply.

    I am an noob, could you explaint for me clearly?

    Regards.

  4. #4
    uxbod's Avatar
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    On your ZCS server telnet to the hostname on port 25 and see what it says ... the ZCS server name does not match your external MX name which they are picking up on.

  5. #5
    huynguyengds is offline Intermediate Member
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    Hi uxbod,

    Sorry about this, but I still can't send to AOL mail.

    I reinstall mail server with hostname same MX record.

    I use dig -x myIP it return revDNS on my IP.

    But when I send an test mail to AOL it show me an error http://postmaster.aol.com/errors/554dnsb1.html

    Help me, pls

  6. #6
    phoenix is offline Zimbra Consultant & Moderator
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    Default

    Quote Originally Posted by huynguyengds View Post
    Sorry about this, but I still can't send to AOL mail.
    Did you read the error message you've posted from AOL?

    The reverse DNS of your IP Address is typical of a dynamic IP Address.
    If you're on a dynamic IP then you'll never be able to send mail directly to AOL, you should instead relay mail through your ISPs mail server.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  7. #7
    huynguyengds is offline Intermediate Member
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    Thanks for quickly reply.

    I have an static IP not dynamic IP

    This issues make me headarche

    This is posted from AOL
    host mailin-03.mx.aol.com[64.12.138.153] said: 421-: (dns:b1) http://postmaster.info.aol.com/errors/554dnsb1.html 421 service not avaible (in reply to end of data command).


    It said I don't have revDNS

    This is my revDNS

    Code:
     dig -x myIP
    
    ; <<>> DiG 9.3.4-P1 <<>> -x myIP
    ;; global options:  printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 30265
    ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
    
    ;; QUESTION SECTION:
    ;myIP.in-addr.arpa.     IN      PTR
    
    ;; ANSWER SECTION:
    revmyIP.in-addr.arpa. 86365 IN     PTR     mail.mydomain.com.
    
    ;; AUTHORITY SECTION:
    30.123.in-addr.arpa.    55898   IN      NS      hcm-server1.vnn.vn.
    30.123.in-addr.arpa.    55898   IN      NS      vdc-hn01.vnn.vn.
    
    ;; ADDITIONAL SECTION:
    vdc-hn01.vnn.vn.        79424   IN      A       203.162.0.11
    hcm-server1.vnn.vn.     79424   IN      A       203.162.4.1
    
    ;; Query time: 2 msec
    ;; SERVER: 172.16.4.2#53(172.16.4.2)
    ;; WHEN: Tue May 26 21:44:43 2009
    ;; MSG SIZE  rcvd: 164
    I can telnet to my mail server
    The hostname as the same MX record

    Code:
    telnet mail.mydomain.com 25
    Trying myIP...
    Connected to mail.mydomain.com.
    Escape character is '^]'.
    220 mail.mydomain.com ESMTP Postfix
    This is nslookup
    Local

    Code:
    nslookup
    >set type=mx
    >mydomain.com
    Server:               172.16.4.2
    Address:             172.16.4.2#53
    
    mydomain.com mail exchanger = 0 mail.mydomain.com.
    >
    Outsite
    Code:
    nslookup
    >set type=mx
    >mydomain.com
    Server:               210.245.24.22
    Address:             210.245.24.22#53
    
    Non-authoritative answer:
    mydomain.com mail exchanger = 10 mail.mydomain.com.
    
    Authoritative answers can be found from:
    mydomain.com nameserver = ns.mydomain.com
    mail.mydomain.com      internet address = myIP
    ns.mydomain.com        internet address = 203.163.96.67
    >
    I can sent to any mail server but AOL is don't

    Many thanks for your advice
    Regards,

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