Welcome to ISAserver.org
Forums |
Register |
Login |
My Profile |
Inbox |
RSS 
|
My Subscription |
My Forums |
Address Book |
Member List |
Search |
FAQ |
Ticket List |
Log Out
Email Header is ISA's EXT NIC Address, Cannot Send email to servers requiring reverse DNS lookup
|
Users viewing this topic:
none
|
Logged in as: Guest
|
Login  | |
|
Email Header is ISA's EXT NIC Address, Cannot Send emai... - 24.Jun.2008 7:39:47 PM
|
|
|
bhavin78
Posts: 428
Joined: 18.Jul.2005
From: USA
Status: offline
|
I just published Exchage server 2003 on ISA Server 2006, I am not able to send email to servers requiring reverse DNS lookup (aol,dyndns, juno etc). Email to this server are not deliver and in the Email header it has primary address of ISA Server Ext NIC , Why? What I need to configure so it has IP of ISA Server EXT NIC (used for Exchange server)
We have created MX record on our DNS server which points to Internal NIC of exchange server.
How and where do I change the PTR record to point to IP address used for Exchange Publishing ?
Can I get some help please?
< Message edited by bhavin78 -- 24.Jun.2008 10:30:28 PM >
|
|
|
|
|
RE: Email Header is ISA's EXT NIC Address, Cannot Send ... - 25.Jun.2008 7:30:22 AM
|
|
|
paulo.oliveira
Posts: 609
Joined: 3.Jan.2008
From: Amazonas, Brazil
Status: offline
|
Hi,
when your mail server sends an e-mail, it first send it to ISA and ISA do the NAT of the private addres to a public IP configured on ISAīs external NIC. Is the same when you access a webpage.
quote:
We have created MX record on our DNS server which points to Internal NIC of exchange server.
Wich DNS server the internal ou external? Why your MX record is pointing to an internal IP?
Regards,
Paulo Oliveira.
|
|
|
|
|
RE: Email Header is ISA's EXT NIC Address, Cannot Send ... - 25.Jun.2008 7:33:25 AM
|
|
|
IanC
Posts: 161
Joined: 11.Jul.2007
From: UK
Status: offline
|
Outbound mail will always use the primary IP address of ISA's external NIC as its source. You will need to add a PTR record to your external DNS zone pointing to this address.
Ian
_____________________________
Ian Currie
http://www.curriecomputing.com
|
|
|
|
|
RE: Email Header is ISA's EXT NIC Address, Cannot Send ... - 25.Jun.2008 11:50:12 AM
|
|
|
bhavin78
Posts: 428
Joined: 18.Jul.2005
From: USA
Status: offline
|
I do not have external dnz zone on my internal dns server, I created one and addedd host record mail1.domain.com which points to EXT NIC of ISA (for exchange not the primary address)
it is still not working.
do I need to call my ISP to look into my PTR record?
|
|
|
|
|
RE: Email Header is ISA's EXT NIC Address, Cannot Send ... - 25.Jun.2008 1:02:42 PM
|
|
|
paulo.oliveira
Posts: 609
Joined: 3.Jan.2008
From: Amazonas, Brazil
Status: offline
|
Hi,
to clear it up, if donīt configure a PTR record in your DNS server doesnīt mean that your mail server wonīt work. The problem occurs only when you try to send an e-mail to a mail server that makes reverse DNS check.
But, for follow the best practice, you should ask your ISP to create a PTR record for ISA primary IP address and your external mail server IP address.
Regards,
Paulo Oliveira.
|
|
|
|
|
RE: Email Header is ISA's EXT NIC Address, Cannot Send ... - 25.Jun.2008 4:50:47 PM
|
|
|
bhavin78
Posts: 428
Joined: 18.Jul.2005
From: USA
Status: offline
|
Paulo,
Called ISP and found out the PTR record for mx was there but was missing for domain name. Adding PTR record for domain took care of the problem.
Why PTR record is not created automatically on ISP's server ?
Thanks everyone for your help
|
|
|
|
 New Messages |
 No New Messages |
 Hot Topic w/ New Messages |
 Hot Topic w/o New Messages |
 Locked w/ New Messages |
 Locked w/o New Messages |
|
 Post New Thread
Reply to Message
Post New Poll
Submit Vote
Delete My Own Post
Delete My Own Thread
Rate Posts |
|
Printable Version
