Hi, Some guy is relaying a huge lot of spam e-mail via my computer. My computer is normally only used by myself and I do receive a lot of e-mail through several lists, but this guy caused /var/log/smail/logfile to be 41 MB (that's right, forty-one MEGABYTES) [1]. Does anyone know how to prevent such actions, apart from blocking smtp traffic from his computer [2]? I tried mailing his postmaster (using his IP address, not the From: line), but I got a 'message undeliverable' (or something like that) error.
What I would want is a filter that blocks any attempt of sending an e-mail from another host to a user at a third host. I beleive this is called relaying. The filter should look at the 'rcpt to:' smtp command, not at the 'From:' or 'To:' headers. I know this can be done with sendmail, but how do I do it with smail? Remco [1] this file is rotated once a day like on any default Debian system [2] this doesn't prevent others from doing the same trick -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
