Company is going to move Email server(Postfix) from data centre to head office, owing to the true IP will be changed, we will update the DNS Server, the problem is when the email server has been moved to head office, new IP in DNS Server was updated, email server may not receive the email due to the DNS cache problem, others DNS server may keep the old MX record, maybe keep one or two day(s), how can I solve the problem?
p.s. only one MX entry (10) for our email server.
p.s. only one MX entry (10) for our email server.
