Email problem: 550-Verification failed

I didn't see this post..... that's how I found this site and I'm glad I did!
Seems like a fantastic resource!

Still have the errors but I did find a great link to test out your server's configuration:


http://www.dnsreport.com/tools/dnsreport.ch?domain=addyourdomainhere.com

Nice link. Thanks!

Maybe I am missing something here. I have been getting the following failed email for an internal server.

The original message was received at Fri, 11 Nov 2005 02:00:52 -0800 (PST) from root@localhost

----- The following addresses had permanent fatal errors ----- support@mydomain.com
(expanded from: root)

----- Transcript of session follows ----- ... while talking to mail.mydomain.com.:
>>> RCPT To:<support@mydomain.com>
<<< 550-Verification failed for <root@server1.mydomain.com>
<<< 550-Unrouteable address
<<< 550 Sender verify failed
550 support@mydomain.com... User unknown


I have the following in my /etc/hosts file


192.168.150.3 server1.mydomain.com server1


So I feeling like I'm missing something so if any sees it please let me know. Again this is from an internal server sending out reports.

From what I have read /etc/hosts must have the format:

ip-address FQDN (fully-qualified-domain-name) alias1 alias2 alias3 etc

for example this is my /etc/hosts

127.0.0.1 localhost.localdomain localhost
234.124.12.454 mysite.com server mail www

so from what I can see to start is your /etc/hosts should be:

192.168.150.3 mydomain.com server1


Did you test your server in the link I posted earlier? It will tell you
everything that is wrong with your setup. For me it was the same
error you have and it was because I didn't have my MX record set
up correctly.

i am having a similar problem..with emails bouncing back from a certain domain..and its been 2 months ..i am unable to resolve the issue..can someone help me out with this..i get the following error..

The original message was received at Sun, 1 Jan 2006 22:18:39 -0800

----- The following addresses had permanent fatal errors ----- <abc@tibiadubai.com>

----- Transcript of session follows -----
... while talking to tibiadubai.com
>>> RCPT To:<abc@tibiadubai.com>
<<< 550 Sender verify failed

when i try to send an email to a user of this domain..the original email address has been withdrawn from the above error..

however the mailbox at tibiadubai.com is able to receive emails from other users ..

i had this issue when i transferred my hosting from one domain to another..the domain is however still with the previous hosting company ..i just had the dns changed to point to the new hosting compan's servers..

i am not an expert at the technical language in web hosting..

please help..i have tried contacting the hosting company ..but it seems they are also unable to resolve the issue..

you guys are my only hope...

This error can also be caused by a misconfonfigured zone file unsuccessful and/or pending propagation. I have heard and seen other threads regarding this issue and conclusion. However I know for a fact that you do not need to change the hostname. I have setup dozens of boxes and all of them sucessfully share the same hostname and primary nameserver.

so wut do u say ..? how can i possibly find the error & its place of occurence an d solve it ?ny tools ?>?

others ny ideas ?

tnx in advance.

Random googler, ncie thing..
i dont understand the second part of the post.
how do u do that?

You could also use the smtp server configuration. I'm using FreeBSD width Sendmail and have done this:

OPEN /etc/mail/server.mc
ADD-AFTER
MASQUERADE_AS(`myserver.com')
FEATURE(`masquerade_envelope')
define(`confDOMAIN_NAME', `myserver.com')

Another random Googler...

I'm also a SBS 2003 Admin.

Wouldn't it be possible to do the same thing in DNS on the SBS?

For example, in our dnsmgmt snapin (Start>Run>AdministrativeTools>DNS), I hope you will see:

*DNS-
-----ServerName-
----------------Forward Lookup Zones-
-------------------------------------MyDomain.com-
-------------------------------------MyDomain.local-

You see both an internal - .local and external - .com
If not you will need to create the .com zone. Right Click ForwardLookupZones> Select NEW ZONE > Follow the prompts...

Now that you have both zones in place, drill into:

*DNS-
-----ServerName-
----------------Forward Lookup Zones-
-------------------------------------MyDomain.com-


Here you will need to create a new host.
Right Click MyDomain.com> Select NEW HOST (A).
Enter hostname (mail/smtp/pop/webmail/www/etc...), Enter IP address for HOST, Click ADD HOST. Done.

Go to Start > Control Panel > Network Connections
Then right click your Local Area Connection, then click properties.
Highlight Internet Protocol (TCP/IP)
Then click properties. Then click Obtain DNS Server Automatically.
Then click ok.

That should fix it. 99% of the time thats the problem.

Just a random guy searching on google just wanted to say thanks for the info i haven't tested it yet but i think this could be the issue with my site.