Maybe AOL should fix their email gateways and policies. AOL accepts incoming email from any source, including known blacklisted spam relays, but they pay no attention to the SMTP routing information ("received from "). They send "undeliverable" notices and label spam complaints against the unverified "From:" header inside the message -- which can be set to anything by spamware. Spammers have been sending out floods of emails attributed to bogus usernames at domains lifted from web pages cached on search engines. AOL sends the reject messages to the accused domain, ignoring the actual source of these emails (typically hacked computers on cable modem networks in Spain, France, Canada, and various US college campuses). If emails to invalid users are not blocked at the SMTP delivery connection, they should be silently discarded, due to the unreliability of email tracking information. By generating misdirected response emails to all the bogus spam emails, AOL is, itself, spamming the internet, further distributing these spam mail messages. When I tried to block such bogus reject messages with a policy reject, AOLs relay servers responded by retrying the connects every 30 seconds. I've had to block the AOL relay servers at my firewall. Somebody at AOL really needs to get a clue about internet email configuration. .