Hi,
we are using an internal postfix server to send mail,
we now want to send mails from the internal postfix server to users at another exchange 2013 server which
is also within the internal network. if we try to do so we run into the following error message:
Diagnoseinformationen für Administratoren:
Generierender Server: mail.ourdomain.com
192.168.21.21 Remote Server returned '<192.168.21.21 #5.7.1 smtp; 550 5.7.1 Unable to relay>'
I tried to setup an new RECIEVE Connector, i added the remote network ip adress to the "remote networks"
but we still get the error message.
How can we manage the following:
Allow an internal postfix mailserver to send mails to an internal exchange 2013 user ?
Note: Every other Mailrelated Servers works perfectly, we can get mails, we can send mails etc.