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cannot send mail to internal exchange users - 23.Jan.2007 7:09:24 PM

Joeb1

Posts: 43
Joined: 17.Jan.2007
Status: offline

I have recently setup MS echange server 2003 on MS SBS Server 2003.

I am having a problem where certain users cannot send mail to another internal user. All users can send and receive to/from external sources.

If a message is sent from one internal user to another the sender will receive a message a short time later saying that the delivery failed.

I am using the POP3 connector in System manager to download mail from each users pop account.

what could be causing this problem. Are there any settings within system manager that need to be changed.

Post #: 1

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RE: cannot send mail to internal exchange users - 24.Jan.2007 12:48:39 PM

asmit21

Posts: 21
Joined: 22.Jan.2007
Status: offline

Ok, can I ask a question first?
Is there a specific reason you are using pop3 for internal users?
If I am assuing correctly, you have an internal network on a domain setup by the SBS and your users log in from the local(private) network on to the servers domain?
And the other question, are you using Outlook for you client application?

If this is all true, then you have no need to have pop3 enabled on Exchange. And that you can just use the exchange connector feature in Outlook to download the mail. If am am missing something here, let me know, and I will try to fill in the blanks. I will try to do some reasearch on your specific question though. I am not sure, but It may be that some mail that is sent is still routed out to the net and back, and that some loopback process is blocking it, or even a firewall if you have one?

Also, does the users that is sending the message recivice some sort of error or NDR that we can take a look at? (For security reasons, please edit the error message so you idenity will be protected, like IP addresses X'ed out and domain information changed to example@youdomain.com, I only need a general look at it)

_____________________________

Thank You,
~Aaron J. Smith
IT Manager
RG2, LLC
R & G Mold & Engineering
2851 Prairie St SW
Grandville, MI 49418
(616)534-6736 Work Phone
(231)349-6612 Cell
(616)534-6491 Fax
ASmith@RGCompanies.com

(in reply to Joeb1)

Post #: 2

RE: cannot send mail to internal exchange users - 26.Jan.2007 1:13:46 AM

Joeb1

Posts: 43
Joined: 17.Jan.2007
Status: offline

Hi

Each user in this organisation was originally using outlook 2003 with POP3 email accounts. I have recently converted them all over to Exchange 2003 because they wanted to do things like share calenders.

A microsoft support engineer helped me set up the Exchange server and he helped me setup the POP3 connector within system manager to retrieve the mail from each users pop account and route it to the respective exchange mailbox.

I am not sure what you mean by the exchange connector feature within outlook. What I did was remove the pop3 account on outlook for each user and then created a new exchange server account. Is this what you are referring to .

The sender receives a message back saying :
"The Following recipients could not be reached.
accounts@mydomain.com.au
The e-mail account does not exist at the organisation this message was sent to. Check the email address or contact the recipient directly to find out the correct address."

If I send an email to this email address from an external source it works fine. It is only when someone from within the local network tries to send to this address that it does not go through. If the sender tries to send to another user within the local network the message will go through.

for example. john@mydomain.com.au sends a message to peter@mydomain.com.au. (both have exchange mailboxes) the message will go through.

I was having another problem which may be related to this whereby I had converted half of the users over to exchange and the rest were still om POP3 accounts. If a user on exhange tried to send a message to a user on a pop account (all within the local network) the user on pop3 would not receive the message. As soon as i converted the pop3 user to exchange and restarted outlook the messages were there.

So what I believe is these messages going to accounts are sitting on the exchange server somewhere and not being routed out of the local network.

Do i need to create a user called accounts and create an exchange mailbox called Accounts@mydomain.com.au and somehow try and forward these messages to the particular user within the organisation who receives these accounts emails.

I may not have mentioned earlier but the domain admin has emails to this email address forwarded to a user within the organisation.

I hope this is enough information for you.

(in reply to asmit21)

Post #: 3

RE: cannot send mail to internal exchange users - 26.Jan.2007 7:00:26 AM

asmit21

Posts: 21
Joined: 22.Jan.2007
Status: offline

It seems to me there is more here then I saw the first time, If I am correct this is how your system is working:
For Each user:
online pop3 account --> exchange server account --> outlook 2003
But you know when they send a message to an internal user, it might just do this
outlook --> exchange server ---> outlook
And for sending a messege to an external account
outlook --> exchange server (SMTP connector) --> External Server(Mail System) --> External Account

Now if your users are trying to send a message to an internal user using there pop3 email address, like you said, account@mydomain.com.au, I assume that every user through the exchange server is also setup with the address account@mydomain.com.au, so that would cause an issue, that exchange would try to decide what to send it to, and if it was going to the user directly it would say they don't exsit, that is one senorio, the other which now that I think of it would be more likely, that your domain name is mydomain.com.au and that you do not have users setup with the email addresses there, if that is the case, then exchange would try to route the messege within the orginization with not connection to the net, and find that the account does not exist internal, when really the account is located in an online pop3 account.

I have a question, if you have exchange, why still keep the pop3 accounts? Just have you exchange do all the mail handeling?

Well, If I was incorrect on any assumtions I made, please tell me, and I will try again.

_____________________________

Thank You,
~Aaron J. Smith
IT Manager
RG2, LLC
R & G Mold & Engineering
2851 Prairie St SW
Grandville, MI 49418
(616)534-6736 Work Phone
(231)349-6612 Cell
(616)534-6491 Fax
ASmith@RGCompanies.com

(in reply to Joeb1)

Post #: 4

RE: cannot send mail to internal exchange users - 26.Jan.2007 11:36:02 AM

asmit21

Posts: 21
Joined: 22.Jan.2007
Status: offline

I just inquied some information from another poster, and they informed me about something I forgot to tell you. I just though you already looked at it, but There is a Tool called Message Traking in the Exchange System Manager, it is at the Bottom under Tools, you can use that to check on messages that go through exchange, it will check incoming and outgoing, you will have to do some editing to add on some other lines of information, like who it was sent to and the stuff. But try to use that and see what you come up with. It will take some messing around with to get use to how it works. I am still finding new things that it does. But if you need help with it, just click on the help botton and it should tell you everything you need to know, the help in exchange system manager is not that bad with it comes down to knowing what things do, just it is not good for helping you configure your server the way you want it and what information to enter in where. If it could do that, we would have no more problems and our jobs would be lost, casue then there would be nothing to fix! LOL!

_____________________________

Thank You,
~Aaron J. Smith
IT Manager
RG2, LLC
R & G Mold & Engineering
2851 Prairie St SW
Grandville, MI 49418
(616)534-6736 Work Phone
(231)349-6612 Cell
(616)534-6491 Fax
ASmith@RGCompanies.com

(in reply to asmit21)

Post #: 5

RE: cannot send mail to internal exchange users - 28.Jan.2007 6:42:21 PM

Joeb1

Posts: 43
Joined: 17.Jan.2007
Status: offline

Hi
Now I know why microsoft doesn't make these things so user frirendly.

Yes your assumptions are correct.

So is there anyway around this problem. How can i make exchange handle all of the mail if the users have pop3 accounts.

(in reply to asmit21)

Post #: 6

RE: cannot send mail to internal exchange users - 29.Jan.2007 6:26:51 AM

Joeb1

Posts: 43
Joined: 17.Jan.2007
Status: offline

Hi I tried to use the message tracking tool within system manager. It picked up a message I was trying to send to accounts which did not go through.

All it told me was that the message was being processed by exchange and then the final result was that it issued a NDR. There wasn't much more information as to what might be causing this problem.

So I guess I am going to have to try something else.What are my options here.
Do I have to reconfigure exchange to not use the POP3 connector feature and just use exchange to handle all email. or Would I be able to add another SMTP address to the user where accounts emails are meant to be going.

For example. user called Tony has a SMTP email address called tony@mydomain.com.au where he would normally receive email.
Could I then add another SMTP address to this user called accounts@mydomain.com.au. This way if an internal user user sent an email to accounts , Exchange would know that this address also belongs to Tony and thus would not have to issue an NDR.

If I did this would both emails addresses work or can I only have one selected at a time.

(in reply to Joeb1)

Post #: 7

RE: cannot send mail to internal exchange users - 31.Jan.2007 8:23:40 AM

asmit21

Posts: 21
Joined: 22.Jan.2007
Status: offline

You could add another SMTP address for the user if you want to. That might work, but just remeber that the address can only be used once and not on multiple users. I would suggest to use only exchange and not the pop3, if you need users to download pop3 email, have that setup in outlook to do that, but make sure the default to send a message is the exchange server. I would not recomend using exchange to download pop3 emails though. Let me know what your plans are.

_____________________________

Thank You,
~Aaron J. Smith
IT Manager
RG2, LLC
R & G Mold & Engineering
2851 Prairie St SW
Grandville, MI 49418
(616)534-6736 Work Phone
(231)349-6612 Cell
(616)534-6491 Fax
ASmith@RGCompanies.com

(in reply to Joeb1)

Post #: 8