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IP Addresses for 1&1 Mail Servers


Here you can find a list of the IP addresses that the 1&1 mail system uses to send e-mails.

IP addresses of servers that 1&1 customers use to send e-mails:
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 servers used to send 1&1 newsletters, invoices, and employee e-mails:
Servers for sending 1&1 Newsletters:
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