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Postfix: Client host rejected: Access denied

SilentWarrior

New Pleskian
Hi,

I have Plesk configured to accept Mails in the mail server settings.
I use Outlook Client with port 587 to connect to the mail server and like to send mails.
But I alway get a Access denied. Is it neccassary that all IP's are allowed in the Withelist of the mail server ?

Thanks
 
What sort of related error in maillog /usr/local/psa/var/log/maillog ?
 
I'm not sure but I think it was the settings of our firewall and the settings of Outlook.
There are a pop3 proxy and a smtp proxy in our firewall. As I remember I've set Outlook for SSL but in combination with the firewall proxy that not work. So I switched back to port 25 without SSL.
 
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