troubleshooting Question

External emails being bounced from our exchange server

Avatar of John-S Pretorius
John-S PretoriusFlag for United States of America asked on
ExchangeSBSEmail Protocols
24 Comments1 Solution681 ViewsLast Modified:
Good Day,

We suddenly started having problems with emails sent from anywhere else but our own domain to be bounced back to the sender as undeliverable. Local Group emails are still being received and we within the doman can send emails just fine.

We are running a Server with Exchange installed on it, and the only drastic change that has been incorporated is email addresses user being created to send Remote event messages outside our offices at locations without creating accounts on the server itself, I'm not sure why the email maessages actually gets send without an account being created on the server but they do.

We have about 15 sites, each one a different email address and set up to do POP over SMTP using the Administrative password and site email address as username - -I never had to create a username on the server.

This part has been functional for about a week now, since yesterday all emplyees within our domain is not receiving any email from senders outside our domain.

Can anyonep lease assist,


Regards,


John-S
Hi. This is the qmail-send program at yahoo.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
 
<SteveM@aptchicago.com>:
205.234.223.160 does not like recipient.
Remote host said: 550 5.1.1 <SteveM@aptchicago.com>: Recipient address rejected: User unknown in relay recipient table
Giving up on 205.234.223.160.
 
<mattm@aptchicago.com>:
205.234.223.160 does not like recipient.
Remote host said: 550 5.1.1 <mattm@aptchicago.com>: Recipient address rejected: User unknown in relay recipient table
Giving up on 205.234.223.160.
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