Can't send mail to AOL

[huynguyengds]

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

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

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

[uxbod]

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

[huynguyengds]

Hi uxbod,

Many thanks for quickly reply.

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

Regards.

[uxbod]

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.

[huynguyengds]

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

[phoenix]

Originally Posted by huynguyengds

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.

[huynguyengds]

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

 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

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

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

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,