Enter Network password POP3 keeps poping up

SMTP rejected a (%4) mail from '%1' with '%2' connector and the user authenticated as '%3'. The Active Directory lookup for the sender address returned validation errors. %5

Did you have a previous RECEIVE connector working from the internet before? Or have you added a new one?

Have you restart the MS POP3 service? Possibly restarted the Exchange server?

I have created a new receive connector.
And there is a connector for receiving email from smart host.

Restarted exchange and tried restarting pop3 service before posting this question

the new connector is to receive emails from another server in the network.i.e. Internal

Abbasiftt,

1. Can you please a little more detail on this new connector, what settings have you configured, please attach screenshots if its easier.

I'm a little confused on your network setup, I'd be grateful if you could provide more info on the following;
2. how many Exchange servers do you have?
3. what is the topology of your network?
4. how are your client connected to Exchange? MAPI, IMAP or POP3? What port?

I would like to help, but at the moment I cannot visualise you network or understand how everything is connected.

 

I have 2 exchange server 2007 and 2010

Attached the screenshot for 2010

Screen.docx

Can you provide screenshots on permission groups too.

attached as requested
Screen.docx

any updates this is really annoying.

now I removed one server i.e.ex2007
now only 2010 in production but still showing the popup
please help

Just to confirm now, that the clients (Outlook 2003, 2007, 2010) are getting the pop up?

Are they internal or remote?

From the client side, what ports are they connecting on for POP and SMTP? Are they secured?

within the network all are working fine, I am getting the popup only for branch offices. We are connected to all the branches by data line.

They are not secured but I will but a certificate today and install ecrtifictae.

The default install will create self signed certificates, I'm asking this as I want to know are your remote clients connecting via POP on 110 or a secured connection?

I also have to note that from the pictures you attached, you have changed all the default connectors to accept anonymous connections, whether this was a move to make it work I personally would advise correcting the permissions on each connector back to defaults, so that you understand what each connector does and what port.

At the moment you've created another connector but you know what other connector this is clashing with, do you get my point?

Now seems to be ok. I dont know how it become ok.


I appreciate if you can explain how it receive connector works with external POP3 users.
 So that I can understand the concept

problem solved

Great to hear!