Email Error: 550 "Unknown User"

[Animorphs]

I'm using Exim 4.62. Last 2 days I begin to face this problem. All emails sent to @yahoo* domain were rejected. The error is given like below:

The following recipient(s) could not be reached:

'[email protected]' on 6/6/2006 6:17 PM
550 "Unknown User"

Can someone tell me how to overcome this problem? require verify is already commented out in exim.conf and I'm still facing this error.

Thank you.

 

[digi]

.

 

[nobaloney]

If yahoo is telling you that known good users aren't users, then you'd have to bring up the issue with the yahoo postmaster.

Jeff

 

[harro]

Hi there,

did you get that rejection message from the server where the mail account resides? I get a rejection message for one domain (out of the blue - worked 2 days ago and now it is refused) on my own mailserver.

I run Exim 4.6.2 and I find the following line in my exim/rejectlog:

2006-07-29 18:00:02 H=bla.domain.nl (name) [x.x.x.x] F=<[email protected]> rejected RCPT <[email protected]>:

I changed the acutal names. The rejecteddomain.nl is not hosted on my server and I could send emails there fine until yesterday. This is the only domain that I noticed this behaviour with!

I did not run any updates or make any changes yesterday.

So 2 questions - How can exim suddenly reject names and secondly where can I find the list of domains that is does reject, so I can edit it?

Thank you for any pointers!

Harro