Hi Marc
Cablecom has also set some of your IP-Ranges on their blocklist some time ago (This week again as I remember).
There are some ways you can go, to get in touch with a company [1] via your Helpdesk
I did try. Opened a case ID. Asked directly for a mailserver-techie... no way to get through.
A day after the issue or so, we managed to find somebody that could give us a direct contact to the responsible tech. The problem then was solved within a few minutes. The cause was never found out.
About one whole week later I got a call back from the helpdesk about the Case ID I opened. They told me they could not find any problem. I explained to them that there was a problem, that we managed to contact the mail admin and that he solved that problem and that I wanted to know why they took one week to tell me that there was no problem and this statement being definitely wrong. Sorry, the Helpdesk is completely useless if you're not a CC customer.
[2] try the website
Points to the Helpdesk.
[3] via your account manager
What account manager?
[665] RIPE
Did you try to call the contacts there? You get to the helpdesk :-(
[666] swinog mailing list
Guess why so many other ISP complain on this list?
Our suggestion to Cablecom was and still ist: If you see email abuse from our network. Go on and block that server, but please call us immediaely by phone or at least send an email to our abuse department. We will try our best to resolve that issue, that's what we're here for.
None of this ever happened. We only learned of those blockings from our own customers complaining to us about their email being rejected by cablecom.
Regards -Benoit-