Hello all, I have a sitution that I am trying to set up. I have 2 email servers that run on Windows: one is for internal purposes, the other is external purposes. The external one will receive e-mail from the outside world, clean it up and forward it to the internal one. There are 2 Windows Vista machines and 2 Unix (OpenSuse Linux) machines. Since there can be only 1 email server per domain, I thought I would: -> set up a local domain with ALL of the machines in it -> set up a DNS server for the local domain -> set up a MX record in the DNS server for the email For the external machine, just have a Dynamic IP point to the Windows machine holding the external email server. Does this sound plausible? Does this make sense? Is it easier to set up DNS in Linux or Windows? TIA

hi, you can have has many mx records tied to a domain (usually a practice to achieve redundancy). usually such mx records are priotized based on the number assingned to them when the mx record was created. for your use case , by dynamic ip i assume u mean public IP. so what you would need to have a dns entry (a record) that ties the name of your domain to the public IP and then create an mx record that refrences that a record in the DNS. usually DNS in use is not your local dns but rather a public dns that can allow people outside your organization to ba able to locate your mail server. the post below explains more http://www.petri.co.il/configure_mx_records_for_incoming_smtp_email_traffic.htm http://www.shudnow.net/2008/11/08/exchange-2007-mail-flow-dns-records-connectors-and-tls/ well i speak for myself and for the ease of administering your environment DNS on windows is a better bet!

Hi I agree with muppielee, in addition to his post IF you only have one server/appliance that face internet (1 public ip address) there is no need to have 2 mx records, this is used for redundancy. Just create up like above, one A record and point the MX record to it. On the public DNS zone. Jonas Andersson MCTS: Microsoft Exchange Server 2010, Configuration | MCITP: EMA | MCSE/MCSA Blog: http://www.testlabs.se/blog