Are those hosts visible to the Internet? I've seen that behavior when spammer's have contacted my secondary and tertiary MX hosts directly... That's the only thing that pops to my mind. ________________________________ From: ChongJa@xxxxxxxxxxxxxxxx [mailto:ChongJa@xxxxxxxxxxxxxxxx] Sent: Wednesday, December 21, 2005 10:32 AM To: [ExchangeList] Subject: External Domains showing on internal Bridgehead I have a connector setup with two Exchange Bridgeheads going to two smarthosts (Mailsweeper SMTP Gateway) Sometimes in the queues of the bridgehead I see remote domains such as hotmail. Not many though maybe around 4-5 external domains. My question is how and why are they showing up since these are not supposed to be directly establishing SMTP sessions with remote domains but sending to the smarthosts? Thanks