I've an account in exchange with multiple addresses
(i.e. email@example.com; firstname.lastname@example.org; email@example.com; firstname.lastname@example.org)
the first one is the default address that is good in 99% of cases
I've tryied to send a mail with some other address of mine (I'm specifically interested about email@example.com) changing the "from" filed manually following this solution
but when I send the message I get the NDR from the server
"it's allowed to send a message with another sender address only if you have the needed autorizations" (I'm translating from italian, so the english message could sound a little different)
I wasn't able to find such permissions i my exchange 2010 settings, any help?
thanks in advance