Search Again: Re: DNS records to support EIMS 2.2 From: Men & Mice Support Date: Monday, May 10, 1999 Time: 8:35:00 am >Currently, I'm running three mail servers on three different machines. I am >considering purchasing EIMS 2.2 and running all three mail servers on one >machine since it supports multiple domains. > >My question is, in my DNS settings can I just modify the records that point >to the current mail servers to point to the machine running EIMS or do I >have to modify and add CNAME records for it to work properly? You can simply change the MX records for each domain to point to the unified server. There are two rules to keep in mind when setting up a mail server's DNS records. 1) It is illegal for the MX record to point to a name that doesn't have an A record. This is also true of NS records, by the way. 2) Some mail servers, in an attempt to combat spam, will try to confirm a mail server's name and address by looking for a PTR record for the address. If the resulting name doesn't match the name in the MX record, they won't receive mail from that server. Therefore, for best results, there should be three records associated with a mail server (not necessarily in the same file): domain.name. MX priority# mailhost.name. mailhost.name. A mailhost.address mailhost.address PTR mailhost.name. I hope this is clear. ________________________________________________________________________ Chris Buxton Men & Mice cbuxton@menandmice.com http://www.menandmice.com

Messages In This Thread: DNS records to support EIMS 2.2 by David Stempnakowski on May 10, 1999 at 5:19:00 am Re: DNS records to support EIMS 2.2 by Mikkel Nepper-Christensen on May 10, 1999 at 5:34:00 am Re: DNS records to support EIMS 2.2 by Jona Tallieu (T & T n.v.) on May 10, 1999 at 6:53:00 am Re: DNS records to support EIMS 2.2 by Men & Mice Support on May 10, 1999 at 8:35:00 am