@ IN SOA localns1.fion.co.in. admin.fion.co.in. (
42 ; serial (d. adams)
3H ; refresh
15M ; retry
1W ; expiry
1D ; minimum
IN NS localns1.fion.co.in.
IN MX 10 mail.fion.co.in.
1) The hostname of the server is the same one on which it is hosted which is bssossapp01.snl.com. But, I am not able to understand the entry localns1.fion.co.in. Is it possible that there are multiple hostname aliases for a server?
"localns1.fion.co.in." is just the name of the originating host. It's basically an embedded comment.
2) How to determine the entry to be put in hostmaster-email directive which is showing as admin.fion.co.in in our setup?
This is the email address of whom should be contacted if a DNS user detects a problem or has a question. Just change the email "@" to a dot "." and you are done.
3) How to determine the email-server-name in the MX record which is showing as mail.fion.co.in as above?This is the fully-qualified domain name for the server that you want mail sent to this domain to handle. When sendmail has a piece of mail, it determines the domain and then does the equivalent of:$ dig -t MX fion.co.inand then uses the prioritized list of mail handlers as destinations to try sending the piece of mail.