Exchange 5.5 the recipient name is not recognized

Exchange 2000

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Exchange 5.5 the recipient name is not recognized

Postby Joe Reiss » Fri, 19 Sep 2003 00:04:47 GMT

Hi All,

I should stress that i'm the software developer not the Admin.  My users are
using Exchange 5.5 with NT 4.0.  My application (run on individual
workstations) uses a SMTP component to generate email.  Local emails (within
LAN-domain) are sent OK.  Anything external gets rejected with 'The
recipient name is not recognized'.  I know that the email address is valid
in these cases.  They can use Outlook (uses mapi) with no problem.

The admin assures me that SMTP on Exchange server is setup OK and as long as
I'm just sending emails there should be no security problem.

Can anyone point in the right direction so I can tell the Admin what to look
for?  I'm sure it's a problem on his side and not mine.

If I posted twice sorry.


Re: Exchange 5.5 the recipient name is not recognized

Postby Beth Belluardo (MSFT) » Sat, 20 Sep 2003 21:51:26 GMT


I have a couple questions to make sure that I understand how your
application drops mail off on the server.

 Does it put the messages in the pickup folder or make an SMTP connection to
the Exchange server?

Exchange has the ability to lock down who can and can not send mail through
the server.  When users are connected via Outlook, the are authenticated and
can always send mail. However, if you are not authenticated, it may not let
you send the mail.  Does your program have the ability to pass
authentication commands?  If not, on the Exchange server, if the Admin opens
up the properties of the Internet Mail Connector, on the Routing tab, have
them choose the Routing Restrictions tab.  On the next screen, under "Hosts
and Clients with these IP addresses"  add the IP address of the application
server generating the email.  Once they restart the Internet Mail Service,
can you now send mail to external domains?

Best Regards,

Please do not send email directly to this alias. This alias is for newsgroup
purposes only.

This posting is provided "AS IS" with no warranties, and confers no rights.


Re: Exchange 5.5 the recipient name is not recognized

Postby Joe Reiss » Sat, 20 Sep 2003 23:36:30 GMT

Thanks for the reply, I will pass this on to the Admin.




Similar Threads:

1.The recipient name not recognized, exchange 5.5


All of a sudden the Exchange 5.5 server refuses to send some mail. The
message we receive is:

The recipient name is not recognized
The MTS-ID of the original message is:

And that's it.

Not all mail is rejected though. When I reroute the mail through a
remote mailserver then the mail to domains hosted on that server are
accepted and sent. Mail to other domains is not sent. I can't reach

If I use DNS to send the mail I can not really check, some mail has
been sent but mail to a hotmail account has not.

I ploughed my way through, I read everything that
Microsoft has to say about this issue. The thing that comes closest is
that the MTA has a problem with the address space. I checked and
rechecked but everything is exactly as it is on a working exchange 5.5

What has been changed in the environment? The ISP's MX record has been
changed, because of the inplementation of an ADSL line. The router has
gate 25 open. A local DNS server has been installed, with forwarders
to external DNS servers.

Does anybody know how to get this MTA errormessage out of the way?


2.5.5 recipient name is not recognized

I inherited an odd setup:  Exchange Server 5.5 on a Windows 2000 domain 
controller is used for internal e-mail, an external pop server is used for 
external e-mail.  The outlook clients are configured to connect to both the 
exchange server and to pop into the external account.  Exchange server is 
used to send all e-mail, both internal and external.

I was once told that this configuration would not work well for Exch. server 
2000; but I don't know if this holds true for 5.5.  The problem I have is 
that occasionally, a user will try to e-mail some external e-mail address and 
get the following message:

The Recipient name is not recognized.

It may happen for a day or so and then the next day, the user can e-mail the 
external address without error.   There does not seem to be a pattern to this 
behaviour.  Any help would be appreciated.

3.Recipient name is not recognized...

Windows 2000 Server
Exchange 5.5 SP4

We created a distribution list for "All Employees". When we send an email 
out to all employees, one always bounces back saying the recipient name is 
not recognized. The bounce back comes from an email address of a former 
employee. The mailbox doesn't even exist anymore and is not in the 
distribution list, however we still get the bounceback from this email 
account?? Where is it hiding? I have verified it is not a hidden account as 
well. All help appreciated!! Thanks!


4.The recipient name is not recognized

I am running Exchange 5.5 SP4 on an NT 4.0 SP6a box. When sending an email to a any email address at a specific domain, from any PC or logged in as different users, I receive the following NDR

Your message did not reach some or all of the intended recipients

      Subject:	FW: Grozier-Bayer AG Preliminary Objection
      Sent:	1/5/2004 10:01 A

The following recipient(s) could not be reached

      ' XXXX@XXXXX.COM ' on 1/5/2004 10:02 A
            The recipient name is not recognize
	The MTS-ID of the original message is: c=US;a= ;p=Our Company, S;l=Our Server Name-040105150125Z-6181

This is the entire messag

If I send to this domain from home there are no issues, so I know the address is good. I type it in manually as opposed to replying or using a contact. I searched the MS knowledge base and didn't get much help there. It's a typical SMTP address, so it shouldn't be an issue with GWART as mentioned in the only article that seems relevant to my particular issue.

Any help would be greatly appreciated

5.The recipient name is not recognized when sending Meeting Request

I've experienced this same problem and found that it was 
directly related to the these users having people listed 
in Outlook as delegates.  When you remove an employee make 
sure you go into Outlook (using their account) and remove 
any delegates they had assigned to their mailbox.  You 
MUST open an outlook profile as that user, as the 
permissions on individual mailbox folders may not directly 
correspond to whats shown in the Delegates tab.  It's even 
better if you create groups that people can delegate their 
calendar to, so if users come and go you won't have this 

Patrick Rouse
Microsoft MVP - Terminal Server

>-----Original Message-----
>We had 2 users who were part of a large distribution 
>group named "TRAVEL CLAIMS". After these 2 users left the 
>company and their mailboxes were deleted; we have the 
>following issue.
>Each and everytime any user on the domian sends a MEETING 
>REQUEST to TRAVEL CLAIMS, the following email is returned 
>to the sender. We can't find these 2 users in any 
>group... help!
>Your message did not reach some or all of the intended 
>      Sent:	18/11/2003 3:15 PM
>The following recipient(s) could not be reached:
>      Debbie Cannon on 18/11/2003 3:15 PM
>            The recipient name is not recognized
>	The MTS-ID of the original message is: 
>c=AU;a= ;p=Worldcare;l=EXCHANGE-031118051511Z-263169
>      Richard Underwood on 18/11/2003 3:15 PM
>            The recipient name is not recognized
>	The MTS-ID of the original message is: 
>c=AU;a= ;p=Worldcare;l=EXCHANGE-031118051511Z-263169
>With thanks
>Bretto (Australia)

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