This happens sometimes
if the changes in the Internic database have not been propagated
throughout the Internet yet, which can take 2-4 days. However
some ISP's DNS keep cached information much longer. Follow the
steps below to locate the source of the problem if propagation
takes longer than 4 days.
To verify that your ISP's DNS resolves MX (mail exchange) record
for your domain to correct IP address do the following:
- Ping
your mail server by executing at command prompt ping mail.my_domain.com.
Note the IP address. it shud be the same ip as mention in your
welcome message .
If the IP addresses are the same, then you need to check on your
e-mail program configuration to make sure that it conforms with
the recommended settings - Article 594.
If the IP addresses are different, you need to make sure that
Internic record for your domain is actually updated. If the domain
record is updated, you need to contact your ISP with the request
to check on their DNS settings. or contact our support executive
in this case