In the panel, open Email Accounts, choose the domain that already points at this host, and create the mailbox. Use the webmail link on the same screen. If mail does not arrive, check that MX records match the values in the client area and wait for DNS cache, up to 48 hours.
Sign in to the client area and keep the order reference nearby. Prices and windows on thedatadynamo.site stay in Indian rupees, with a 7-day cancellation on new hosting orders and no fee return on a domain once it is referenced.
Write the exact error into a support ticket. For mail and DNS, allow up to 48 hours of cache time before treating the change as failed. For a plan that is too small, use an upgrade and pay the difference rather than opening a second overlapping service.