Open relay on Exchange 2007 Hub-Transport
Posted on 2009-04-01
The theoretic question: - )
I have an Exchange organization with edges, hub-transport servers, client-access servers and mail-sorages. Now if some server (for example, antivirus) tries to send a mail via my hub-transport server it gets an error about authentification is required. Ok, I read about I can make an recieve connector and configure this connector as secured, all works well. But this is open relay for my server!
Antivirus server can authorize (how it was on Exchange 2003) but now it's a problem.
I want to know, antivirus server tries to send mail on firstname.lastname@example.org, where mydomain.com is configured as local mail suffix. But authentification is still required.
So is it true because authentification is required for sending email for antivirus server but not for recieving the mail for @mydomain.com