I don't know - but I do find this in their email headers:
At the bottom of that page you can even find the Swisscom logo.
My 2 cents, hope they help!
On 10/31/17 15:08, Benoit Panizzon wrote:
Ich beobachte das gleiche Verhalten mit contabo.de, aus dem Netz
188.8.131.52/22, evtl. gar 184.108.40.206/20 ...
> DE-GIGA-HOSTING-20100728 220.127.116.11 - 18.104.22.168
> CONTABO 22.214.171.124 - 126.96.36.199
Da scheint das
I had a similar problem when I set up the mail server on
my virtual server and wanted to send mail to domains that
are hosted by zoneedit.com.
After searching a while, I think this is the way how it works:
Bluewin does a reverse DNS lookup on your IP (188.8.131.52),
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