Unable to connect successfully to the destination mail server

Hello there,

I was checking the mailroot/Queue folder on my mail server and found quite a good number of .eml files struck in there.

For many messages in the Queue folder, eml file says -

'This is an automatically generated Delivery Status Notification.
Unable to deliver message to the following recipients, due to being unable to
connect successfully to the destination mail server.
xxx_at_hotmail.co
'

Though it's quite clear that it is because of the wrong email address with 'uk' missing from end of email address.

What can I do to remove this message from queue folder so that mail server doesn't keep on trying to send such messages with wrong email addresses?

Thank you!

What mail server are you running?

Each mail server has their own command to purge messages from the mail queue.

It is an SMTP server.

Also, I don't want to run any command manually, but wondering if there is any setting that I can change so I can stop mail server trying re-sending mail to wrong email addresses.

I know it's an SMTP server, but which one? Postfix... Sendmail... Qmail... something else? Each mail server has their own set of configuration options.

@hiker, sorry if it seems like a silly question - but how can I find which SMTP server ?
Though I think it is SMTP service running on IIS 6.0.

Sorry.. Assumed you were using Linux. I'm not as familiar with the SMTP server in IIS as far as anyway to stop messages from being resent.

The problem isn't the mail server it's your client program sending invalid email addresses.

The messages you describe in the Queue folder apparently are bounce messages.

You can look through the IIS SMTP settings and see if there is a way to turn off these bounce messages, but if there is, and you do, how would you know you have a problem somewhere?