Hello List
A Mailserver from a business customer of ours is blacklisted @ bluewin. The Error Message from Bluewin MXes directing to the removal site: https://www.swisscom.ch/en/res/hilfe/ip-blacklist.html
Our customer has requested removal via this form, no success.
Our customer has contacted bluewin and opened a trouble ticket. He got the information that his ISP (us) should take care to remove his IP from the blacklists, but is not getting any information about which blacklists.
Blacklisted: 0
We are at a loss. Does anyone know what kind of blacklists bluewin uses?
Kind regards
-Benoît Panizzon-
Hi Benoît,
I don't know - but I do find this in their email headers:
X-Bluewin-Spam: Cloudmark
At the bottom of that page you can even find the Swisscom logo.
My 2 cents, hope they help!
Gruass, Franco
On 10/31/17 15:08, Benoit Panizzon wrote:
Hello List
A Mailserver from a business customer of ours is blacklisted @ bluewin. The Error Message from Bluewin MXes directing to the removal site: https://www.swisscom.ch/en/res/hilfe/ip-blacklist.html
Our customer has requested removal via this form, no success.
Our customer has contacted bluewin and opened a trouble ticket. He got the information that his ISP (us) should take care to remove his IP from the blacklists, but is not getting any information about which blacklists.
Blacklisted: 0
We are at a loss. Does anyone know what kind of blacklists bluewin uses?
Kind regards
-Benoît Panizzon-
Hi Franco and Swinogers
Posting on SWINOG does seem to accelerate problem solving sometimes :-)
Swisscom has contacted our customer, explained and solved the issue.
Apparently the installed a new anti-spam measure short time ago (I don't know if cloudmark is involved).
They count the number of email to invalid recipients from an ip address. Over a certain threshold, the sending ip address is blacklisted internally.
So if a business customer is sending a newsletter to it's customers and in the past did not really bother to unsubscribe bouncing recipients, he is at risk getting blacklisted @ bluewin.
-Benoît Panizzon-
-
Benoit Panizzon -
Franco Hug