Hi Exchange experts!
I have a question regarding transport servers behaviour for smtp addresses that are not listed in accepted domains.
I have a mailbox with a secondary smtp address : abc@aaaa.com , and aaaa.com is not listed as accepted.
Assuming that mx record for aaaa.com is configured correctly with my server IP. I tried sending an email to that address and it is delivred. This made me confused about my little knowledge. I thought exchange would reject such connection.
Can any one help me to understand this behaviour? (antispam agents are disabled and forefront protection for exchange is installed on hub server.)
Thanks in advance!