I have a M$Exchange Server 5.5 that in some MAIL-ABUSE's test are open for relay. My Exchange are configured for POP3 users and I already tried everything to close my Exchange for relays.
I did all the issues of Technet but my server already accept messages to RCPT TO: abcd%domain.com for...
First, I'm sorry about my english !!! I'm brasilian and I don't speak english, I just read it.
I have an Exchange Server 5.5 SP3 running in a very "instable" Windows NT4.0 SP6. Because this "Instable" S.O. I will install my Exchange in another SERVER. The last Administrator...
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