preoblem with DNS (A) records

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  • gogi100

    So, my company has bought a hosting package. the hosting of ISP contains web, mail …. My company wants that mail server exists in the DMZ in my company.
    I have asked the ISP provider to enroll (A) record for my mail server, CNAME and MX record for Provider told me that on the DNS server in the zone there is one (A) record for their DNS server and it is impossible to write another one because of nobody wouldn’t see to our company website. I typed the command
    >ls -d

    [] SOA (
    2012080300 86400 7200 3600000 86400) MX 0 MX 10 NS NS A x.x.x.55 (address of dns server)
    ftp CNAME
    localhost A
    mail CNAME
    www CNAME SOA (
    2012080300 86400 7200 3600000 86400)

    I think it is possible to insert next A xxx55 (DNS server address) and A xxx179 (my address MailServer) and the mail alias CNAME at A xxx179 (the address of my mail server).
    If this is not possible what I would do to resolve this problem?
    thank you

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