Hi, I think my smtp server has been used for spamming few hours ago. I received 55 emails from "Mail delivery subsystems", saying some random email cannot be sent to @yahoo.com, for example:
The original message was received at Fri, 19 Mar 2004 00:13:54 +0800
with id i2IGDsuR004496
----- The following addresses had permanent fatal errors -----
(reason: 553 VS10-RT Possible forgery or deactivated due to abuse (#5.1.1))
----- Transcript of session follows -----
... while talking to mx1.mail.yahoo.com.:
<<< 553 VS10-RT Possible forgery or deactivated due to abuse (#5.1.1)
550 5.1.1 firstname.lastname@example.org
... User unknown
<<< 504 At least one RCPT command is required
I'm stil looking for a way to prevent this, but in case if anyone here know may help me out. In case if the server being used by spammer again.
By the way, is there a way to put in password for the smtp server? But if i do this, will it interfere with phpBB, since it will use smtp to email others, but I dont see it asking for password.
And is spamassassin the right answer for me? THanks.