Thanks for the reply BJ. I sort of only understood half of what you said, but I think I'll forward your comments to the network guys. Hopefully they know all this already, but they don't seem to be confident, hence my question.
All I understand is that there are DNS records at the registrar which I can adjust to point the web domain to the new web hosts. I didn't know there were separate ones for email and web. I also don't know where to find A records or MX records? -----Original Message----- From: Bj [mailto:[EMAIL PROTECTED] To add to Todd's reply - Exchange is an internal mail system, and whatever you do to the company's Internet connection, Exchange will carry on working (internally). It's usually however configured with an Internet mail gateway that allows messages to be sent and received to and from external addresses using a domain name that resolves to an IP address. The way external email finds [EMAIL PROTECTED] is by going to the DNS record for yourcompany.com and getting the IP address of the gateway server from the MX record(s). There are separate DNS records for Web pages and mail, and they can point (if required) to different places. The A records point to IP addresses for the domain eg mysite.com CNAME records are used where the IP address is already defined by an A record to provide pointing for directory prefixes such as www or ftp MX records provide pointing for email. You can have more than one, pointing to different addresses, with different priority levels so that email gets through to a backup server if the main one is down. If your client has existing MX records that directly specify an IP address rather than a URL, then adding or changing an A record for Web pages shouldn't affect the flow of email at all. Even if you move the domain name to a different ISP and move the DNS records to their nameserver, as long as you keep the MX records same as they are now then there shouldn't be any disruption because the cached records on Internet routers and the IP address they pick up once the cache expires should be the same. Only if the IP address of the mail server changes do you have a problem. Or, if the DNS records for mycompany.com look like this and you change the A record to a different IP then you have a problem: IN A 111.112.113.114 MAIL IN CNAME mycompany.com MX IN 10 mail.mycompany.com Talk to their ISP early about what you want to do and ask for the DNS record details. Bj -----Original Message----- Hi guys, I have a client who uses Microsoft Exchange for their company's email services. We are in the process of developing a new website for them - at the moment they do not have a website at all. My concern is that if we change the DNS settings to point their domain to a new host for their website that this will disrupt their email services. I have no idea about Exchange or how it works. They have some network guys they contract to support their systems and they advised that changing the DNS will have no affect on their internal email. Can anyone confirm that this is the case? I am just concerned that if we make such a critical change that it will indeed bring down their email systems. Does someone have some knowledge of Exchange and DNS that can advise? Thanks in advance ____ The WDVL Discussion List from WDVL.COM ____ To Join wdvltalk, Send An Email To: mailto:[EMAIL PROTECTED] or use the web interface http://e-newsletters.internet.com/discussionlists.html/ Send Your Posts To: [email protected] To change subscription settings, add a password or view the web interface: http://intm-dl.sparklist.com/read/?forum=wdvltalk ________________ http://www.wdvl.com _______________________ You are currently subscribed to wdvltalk as: [email protected] To unsubscribe send a blank email to [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with.
