Hi,
I have Exchange server 2016.
Today I saw that we don't receive mails from one external domain (wp.pl).
For example, our client sent to us an email from xxx@wp.pl
We didn't receive this mail, but he got an response message, which contains:
I have Exchange server 2016.
Today I saw that we don't receive mails from one external domain (wp.pl).
For example, our client sent to us an email from xxx@wp.pl
We didn't receive this mail, but he got an response message, which contains:
"Hi. This message was created automatically by mail system at ....
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.
<xxx@our.domain>:
smtp-ip-address does not like recipient.
Remote host said: 550 5.7.54 SMTP; Unable to relay recipient in non-accepted
domain Giving up onsmtp-ip-address."
Does anyone have any ideas on what might be going on here? Thank you.