My setting of this is it installed all Role, like Mailbox, Hub etc, just it is NO EDGE Server Role (my company since no money, so will not deploy Edge Server right now) And it procressing those multi Domain
server.com supercorp.com cp28.com
I setting the "Organization Configuration" --> "Hub Transport" --> "Send Connectord" to using "Internet" and give it a "*" from the Address Space, I had try *.domain.com after the abuse.net test a hour later, same result ... and it is a smarthost post to my ISP's mail server ...
Secondary, I setting the "Server Configuation" --> "Hub Transport" -> "Default Mail" ---> "Permission Group" ---> "Anonymous"
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Now in my company network, I installed one box Exchange for testing ... But experience some problems that (I don't know do it is general or not)
It is open relay ... I using www.abuse.net to test, just enter the mail Server's FQDN name and run
It reponse those
Relay test 1 >>> RSET <<< 250 2.0.0 Resetting >>> MAIL FROM:<spamtest@abuse.net> <<< 250 2.1.0 Sender OK >>> RCPT TO:<securitytest@abuse.net> <<< 550 5.7.1 Unable to relay
Relay test 2 >>> RSET <<< 250 2.0.0 Resetting >>> MAIL FROM:<spamtest> <<< 501 5.1.7 Invalid address
Relay test 3 >>> RSET <<< 250 2.0.0 Resetting >>> MAIL FROM:<> <<< 250 2.1.0 Sender OK >>> RCPT TO:<securitytest@abuse.net> <<< 550 5.7.1 Unable to relay
Relay test 4 >>> RSET <<< 250 2.0.0 Resetting >>> MAIL FROM:<spamtest@server.com> <<< 250 2.1.0 Sender OK >>> RCPT TO:<securitytest@abuse.net> <<< 550 5.7.1 Unable to relay
Relay test 5 >>> RSET <<< 250 2.0.0 Resetting >>> MAIL FROM:<spamtest@[125.215.149.37]> <<< 501 5.1.7 Invalid address
Relay test 6 >>> RSET <<< 250 2.0.0 Resetting >>> MAIL FROM:<spamtest@server.com> <<< 250 2.1.0 Sender OK >>> RCPT TO:<securitytest%abuse.net@server.com> <<< 250 2.1.5 Recipient OK Relay test result Hmmn, at first glance, host appeared to accept a message for relay.
THIS MAY OR MAY NOT MEAN THAT IT'S AN OPEN RELAY.
Some systems appear to accept relay mail, but then reject messages internally rather than delivering them, but you cannot tell at this point whether the message will be relayed or not.
You cannot tell if it is really an open relay without sending a test message; this anonymous user test DID NOT send a test message.
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What is wrong of the Open Relay?? And what setting that I must do so this mail server can safe send and received to and from Internet?
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