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I need to set the rDNS with my ISP.

JeramieD
JeramieD asked
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Last Modified: 2013-12-14
The company has been on Sorbs for 3 years and until how done nothing.

I know a rDNS or smarthost is required.

The company has an exchange server on their server as well as some sub domains. The main page has been outsourced too a webmaster so THAT ip is different then our server.

Telus has customer registration screen that allows you too input information about your IP.

It has:

IP/MAC address/Hostname/Domain

The IP and mac are obviously correct, but they have for hostname the ip as sxxx-xx-xx-xxx and the Domain as ab.hsia.telus.net. He told me to change the domain to get the rDNS working, but my questions is should I just put the IP address as our main domain company.com is now outsourced too a webmaster?

I know I had too change all the VPNs too the IP, because company.com no longer worked after the change.

Please let me know if more information is needed.
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Expert of the Year 2007
Expert of the Year 2006

Commented:
For a reverse DNS entry it shouldn't domain.com but host.domain.com . domain.com should be left to the web site.
How do you receive email at the moment? Directly by SMTP? If so, what is the host for your MX records? domain.com or host.domain.com ?

Simon.

Author

Commented:
I would assume directly by smtp too their exchange server.

How do I check? and how do i verify my mx records?

I apologize for my inexperience in the matter.

Author

Commented:
Ok it is defiantly directly through smtp.

Author

Commented:
In the SmallBusiness SMTP connectior I am using DNS too route to each address space on this connector.

Should I change to option to: forward all mail to this connector to the following smart hosts, then input smtp.telus.net?
Expert of the Year 2007
Expert of the Year 2006
Commented:
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Author

Commented:
its mail.domainname.com

Author

Commented:
If I change to option to: forward all mail to this connector to the following smart hosts, then input smtp.telus.net?

How can I verify that it is working as intended.
Expert of the Year 2007
Expert of the Year 2006

Commented:
If the smart host setting isn't working correctly then either the email bounce with an error or sits in the queues. Usually the latter.

Simon.

Author

Commented:
So mail will sit in the queue and then be forwarded?

I just checked the queue and their were 2 emails in there, they were legit and I unfroze them.

If I dont do anything will they sit in the queue for a set amount of time then go forward by themselves? or the fact that there were 2 in there means my smtp is not working properly?

Author

Commented:
The reason the above was in the queue I think is because it is not  part of the domain, it was to the owners bell.blackberry.net email address which I added as a contact there are about 5 emails added as POP 3 into sbs as well, can I expect to have problems with these?
Expert of the Year 2007
Expert of the Year 2006

Commented:
The messages will just sit there and do nothing if the SMTP connector isn't configured correctly. If the SMTP connector is configured correctly then the messages will go straight out to the relevant hosts.

Forwarding of email via contacts can be a problem with some smart hosts and some email recipients., This is because the email appears to be becoming from the original senders, not the sender on your domain. Therefore it looks like your server is spoofing the email address. It depends how strict the remote side is.

Simon.

Author

Commented:
In queues under additional information about the SMTP Connector- smtp.telus.net

It says "The connection was dropped due to an SMTP protocol event sink."

But it seems the queue is clearing out except for the one email after every refresh.

Author

Commented:
I contacted Telus and they said there is no restrictions and that the SMTP is not blocked and doesnt require authentication. I just added it as smtp.telus.net then stopped and restated smtp in protocols. The fact that the queue is clearing out within a minutes, tells me it is working as it should?
Expert of the Year 2007
Expert of the Year 2006

Commented:
If the emails are going out, then the SMTP connector is working.
Do you have message tracking enabled? That will show you what Exchange is doing with the email messages.

Simon.

Author

Commented:
After watching the queue some more it seems it is sending out a lot of postmaster@domain.com emails which must be bounce backs?
Expert of the Year 2007
Expert of the Year 2006

Commented:
Postmaster@ are NDRs.
Can you see what those NDRs are? If you change the smart host to something invalid, like [99.99.99.99] (include the [ ] ) then the messages will build. If they are NDRs caused by emails to bogus users then you need to change the configuration of Exchange to reject those. That depends on what version of Exchange you are using.

If it is Exchange 2003 then it is this: http://www.amset.info/exchange/filter-unknown.asp

Simon.

Author

Commented:
I really appreciate your knowledge, time and patience.
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