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Unknown or Illegal alias:myname@mydomainname.com

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by sanjana8480

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We have one mail server hosted into our company with MS Exchange 2003, our domain name called mydomainname.com has been modified with new one i.e. newmydomainname.com. So I modified recipient policies (E-mail Address Policies) in MS Exchange server to *@newmydomainname.com.
Now some users have problem receiving mail.
We have been reported by some of our clients that they receive the following error: -

?sanjana@newmydomainname.com (5.1.1 unknown or illegal alias: sanjana@newmydomainname.com)

Original- Recipient:
Action: Failed
Diagnostic-code: smtp; 550 5.1.1 unknown or illegal alias: sanjana@newmydomainname.com
Remote-MTA: 194.170.0.118?

Note: our MX & PTR records are perfectly well. it is pointing out to our mail server with the IP address of our firewall.
One doubt I have which is when I do the Test Mail Server (under Diagnostics) on www.mxtoolbox.com,
It shows me
Rev DNS Check: OK - 213.XXX.XXX.XX resolves to mydomainname.com

(Pls note this domain name is my old domain name which has been modified to newmydomainname.com)

Can any genius let me know this can be the problem we are not receiving mail from some yours or any other is the problem?

4 replies

by cg it

but the error message says they are not.

eg dns check IP address 213.XXX.XXX.XXX resolves to mydomainname.com when mail is addressed to user@.com

If this is Active Directory, did you change the domain name using the administrative domain rename tool Rendom? This rename tool does not rename Exchange, there are steps to do this , [xdr-fixup]

by sanjana8480

Thanks a lot for your precious reply,
Yes, the above said IP is resolving to my new domain name i.e newmydomain.com, meaing the mx records are well. See the output I get from www.MXTOOLBOX.COM on MX Testing:-

Preference Host Name IP Address TTL
10 Newmydomainname.com 213.XX.XX.XX 21600

20 Mail2.myisp.com 195.XX.XX.XX 21600

When I click the Diagnostics (SMTP Diagnostics) & Test Email Server 3 times on it it gives the below output: -

1st Test
RESULT : Newmydomainname.com
Banner: 220 *******************************************************************************************************200************0*00
Connect Time: 0 seconds - Good

Transaction Time: 1.578 seconds - Good

Relay Check: OK - This server is not an open relay.

Rev DNS Check: OK - 213.XX.XX.XX resolves to newmydomainname.com (NEW DOMAIN NAME)

GeoCode Info: Geocoding server is unavailable
Session Transcript: HELO please-read-policy.mxtoolbox.com
250 newmydomainname.com Hello [64.20.227.13 [375 ms]
MAIL FROM:
250 : Sender [453 ms]
RCPT TO:
550 Relaying denied to
250 : Sender [437 ms]
RCPT TO:
550 Relaying denied to
250 : Sender [469 ms]
RCPT TO:
550 Relaying denied to

by cg it

The test results appear to come from the authoritative DNS server for the FQDN as both IP addresses that the name resolves to are routable addresses.

If these are the authoritative DNS servers of your domain registar and not your internal active directory DNS server, check your internal DNS server for a zone .com. Both your authoritative and your AD DNS servers need to have a DNS zone for the domain name.

In Exchange, you'll need to set it up for the new domain name and new Storage Group as well as GAL, recipent policies etc.

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