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disable ipv6 for smtp

ben83
is it possible to disable ipv6 for just SMPT when using the sophos as an smtp gateway?

background: using ipv6 for vpn and some other stuff but now we got a mailserver that couldn't find a rDNS for our IPv6 adress. 

Rather than setting that up i want to disable ipv6 completly for any mail traffic.


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  • 0
    Afaik that's not possible. Either you use IPv6 or you don't.

    Why not simply setting the PTR record?

    ----------
    Sophos user, admin and reseller.
    Private Setup:

    • XG: HPE DL20 Gen9 (Core i3-7300, 8GB RAM, 120GB SSD) | XG 18.0 (Home License) with: Web Protection, Site-to-Site-VPN (IPSec, RED-Tunnel), Remote Access (SSL, HTML5)
    • UTM: 2 vCPUs, 2GB RAM, 50GB vHDD, 2 vNICs on vServer (KVM) | UTM 9.7 (Home License) with: Email Protection, Webserver Protection, RED-Tunnel (server)
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  • 0
    Afaik that's not possible. Either you use IPv6 or you don't.

    Why not simply setting the PTR record?

    ----------
    Sophos user, admin and reseller.
    Private Setup:

    • XG: HPE DL20 Gen9 (Core i3-7300, 8GB RAM, 120GB SSD) | XG 18.0 (Home License) with: Web Protection, Site-to-Site-VPN (IPSec, RED-Tunnel), Remote Access (SSL, HTML5)
    • UTM: 2 vCPUs, 2GB RAM, 50GB vHDD, 2 vNICs on vServer (KVM) | UTM 9.7 (Home License) with: Email Protection, Webserver Protection, RED-Tunnel (server)
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