This might be of interest - someone posted a query re maintaining a single mailbox across mailservers on the LI list. This might be of help if security holes are not to exist. --- start fwd --- Basically, I had the old server configured for anti-relay. This is the same server with about 100 virtual web addresses on it so it has a LOT of visible IP addresses. No problems with spam relay there, except for an occasional downstream customer with an open relay which we would work with on a case by case basis. When I moved to the new server, It got a new address. As an interim measure, I installed plugd and redirected all smtp and pop3 connections to the new box. This made all the smtp connections look like they came from the old server, which is a trusted host for relay purposes. Thus I had an open relay. Within 2-3 business days I had some spammers find me for relay purposes. My solution? Instead of using plugd, I enabled transparent proxy support for smtp in the new mail server (so It would snarf any traffic towards the smtp port and eat it as if it was going to it). Then I went over to our core router and enabled a route-map to redirect SMTP traffic bound for our key machines (and also downstream open relay problems) to our server. That way, ALL inbound mail connections for machines I select go to this server. If I have a downstream with a problem, I can now "proxy redirect" their mail to me for anti-relay purposes. --- end fwd --- Suresh Ramasubramanian 106D, Aditya Enclave, Ameerpet, Hyderabad 500038, India. Phone: +(91-40)3736553/3745398 | eFax: +(1-603)590-5437 [EMAIL PROTECTED] | [EMAIL PROTECTED] http://www.kcircle.com | http://www.angen.net/~pegasus/ Make it idiot proof and someone will make a better idiot. -------------------------------------------------------------------- The Linux India Mailing List Archives are now available. Please search the archive at http://lists.linux-india.org/ before posting your question to avoid repetition and save bandwidth.
