I am trying to understand how the emails are been configured on our domain. This has previously done by one of the administrator who no longer work with us.
On all the clients machine, emails are configured on Microsoft Outlook by connecting to the POP server to send and receive emails. All I believe it does is download the emails from the POP3 server.
We have a dedicated server so no technical help I can get from my ISP on this.
On the server, I have got the "domain" and server name added under the default SMTP virtual server .
Then I have a POP3 service, where I can also see the same domain and when I click Server Name, the domain name comes up and upon clicking it, I get all the mailboxes listed in the right panel.
I now have been asked to change MX records and lock down the firewall for spam filtering.
Please can someone advise whether the setup I have described above is what is knows an on SMTP server?
How would I know if there is any firewall I can lock down?