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    IP Addresses of the IONOS Mail Servers

    Here you will find a list of the IP addresses via which the IONOS mail system sends emails.

    IP addresses of the servers used by IONOS customers to send emails

    Shared Server Outbound IPs

    IP Address Name
    217.72.192.73 mout.kundenserver.de
    217.72.192.74 mout.kundenserver.de
    217.72.192.75 mout.kundenserver.de
    212.227.17.13 mout.kundenserver.de
    212.227.17.24 mout.kundenserver.de
    212.227.126.130 mout.kundenserver.de
    212.227.126.131 mout.kundenserver.de
    212.227.126.133 mout.kundenserver.de
    212.227.126.134 mout.kundenserver.de
    212.227.126.135 mout.kundenserver.de
    212.227.126.187 mout.kundenserver.de
    74.208.4.194 mout.perfora.net
    74.208.4.195 mout.perfora.net
    74.208.4.196 mout.perfora.net
    74.208.4.197 mout.perfora.net

    Forwarding with a Spam Evaluation Entered in the Header:

    IP Address Name
    82.165.159.5 mout-xforward.kundenserver.de
    82.165.159.6 mout-xforward.kundenserver.de
    82.165.159.7 mout-xforward.kundenserver.de
    82.165.159.8 mout-xforward.kundenserver.de
    82.165.159.9 mout-xforward.kundenserver.de
    82.165.159.10 mout-xforward.kundenserver.de
    82.165.159.36 mout-xforward.kundenserver.de
    82.165.159.37 mout-xforward.kundenserver.de
    82.165.159.38 mout-xforward.kundenserver.de
    82.165.159.39 mout-xforward.kundenserver.de
    82.165.159.43 mout-xforward.kundenserver.de
    82.165.159.44 mout-xforward.kundenserver.de
    82.165.159.132 mout-xforward.perfora.net
    82.165.159.133 mout-xforward.perfora.net
    82.165.159.134 mout-xforward.perfora.net

    Forwarding and Mailer Daemons:

    IP Address Name
    217.72.192.100 mout-bounce.kundenserver.de
    217.72.192.101 mout-bounce.kundenserver.de
    217.72.192.102 mout-bounce.kundenserver.de
    212.227.15.22 mout-bounce.kundenserver.de
    212.227.15.31 mout-bounce.kundenserver.de
    212.227.15.32 mout-bounce.kundenserver.de
    212.227.15.56 mout-bounce.kundenserver.de
    212.227.15.57 mout-bounce.kundenserver.de
    212.227.15.58 mout-bounce.kundenserver.de
    212.227.17.3 mout-bounce.kundenserver.de
    212.227.17.14 mout-bounce.kundenserver.de
    212.227.17.25 mout-bounce.kundenserver.de
    74.208.4.198 mout-bounce.perfora.net
    74.208.4.204 mout-bounce.perfora.net
    74.208.4.205 mout-bounce.perfora.net

    IP addresses of the servers through which IONOS newsletters, invoices and employee emails are sent

    IP addresses of servers used to send IONOS newsletters, invoices, and employee e-mails:

    IP Address Name
    212.227.15.53 mout-csbulk.1and1.com
    212.227.15.47 mout-csbulk.1and1.com
    212.227.126.224 mout-csbulk.1and1.com
    212.227.126.225 mout-csbulk.1and1.com
    212.227.126.226 mout-csbulk.1and1.com
    212.227.126.227 mout-csbulk.1and1.com
    212.227.126.220 mbulk.1and1.com
    212.227.126.221 mbulk.1and1.com
    212.227.126.222 mbulk.1and1.com
    212.227.126.223 mbulk.1and1.com

    Servers That Send Invoices and Support E-mails:

    IP Address Name
    212.227.15.50 mout-cscorp.1and1.com
    212.227.15.52 mout-cscorp.1and1.com

    Internal Company Servers:

    IP Address Name
    212.227.15.7 moint.1and1.com
    212.227.15.8 moint.1and1.com
    212.227.17.7 moint.1and1.com
    212.227.17.27 moint.1and1.com

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