-----Original Message----- From: Len Conrad [mailto:[EMAIL PROTECTED]] Sent: Saturday, July 27, 2002 3:19 PM To: [EMAIL PROTECTED] Subject: RE: [IMail Forum] Store and Forward
>>For example, if the current TTL is 7 days, then the change to the TTL, >>setting it to ten minutes, should probably be made 8 days before the MX >>change in order to accommodate those that just recently cached the domain >>info. > >MX's TTL, or more, before the swtich ... Your choice, it's your DNS that's >going to get pounded until the switch. > Agreed, but the original poster will need to realize that if they do not do it this way, then they should expect to see e-mail continuing to flow into the IMail server until the cache for the domain has expired from all name servers. I would rather live with the short TTL for however long it takes so that when the MX change is made, within ten minutes all e-mail for the domain should be getting delivered to the customer's new Exchange server (also, unless we are talking about an extremely busy e-mail domain, the DNS servers most likely are not going to get "pounded" until the switch--most e-mail domains get so little traffic that the name servers will hardly notice anything). Then all that has to be done is for all users of that e-mail domain on the IMail server to check their IMail accounts one last time before converting their e-mail clients over to the Exchange server. Otherwise, other measures will need to be done in order to get all mail to the Exchange server, which would be much more of a hassle then changing the TTL and then waiting for the appropriate time to change the MX records. Just my 2 cents... Bill Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Please visit the Knowledge Base for answers to frequently asked questions: http://www.ipswitch.com/support/IMail/
