On Fri, 2 Jul 2004, Penelope Fudd wrote: > Recently spammers verified their mailing list using this SMTP dialogue.
This is an old technique called a "dictionary attack" or "directory harvesting". Sendmail 8.13 has countermeasures, like closing a connection after N bad SMTP commands. I run a script from cron that parses the mail log and firewalls off directory harvesters. -- David. _______________________________________________ Visit http://www.mimedefang.org and http://www.canit.ca MIMEDefang mailing list [EMAIL PROTECTED] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
