It doesn't sound like the problem you are seeing, but I remember Barracuda appliances used to have an option called something like "deep header scan" that was on by default or recommended in the manual. What it did was to check the IP address of the sender, not just the MTA. And if Barracuda identified it as a dynamic pool address (which is what many residential accounts have), it got blocked. Very annoying.
-----Original Message----- From: Blueonyx <blueonyx-boun...@mail.blueonyx.it> On Behalf Of Michael Stauber Sent: Wednesday, August 1, 2018 12:19 PM To: blueonyx@mail.blueonyx.it Subject: [BlueOnyx:22306] Re: Barracuda RBL Hi all, > As recently reported here Barracuda has blacklisted the IP address of > the BlueOnyx mailing list server for no apparent reasons. I asked for > a delisting and never heard back. > > Today we're still in the blacklist. I (again) asked for a delisting, > but as of yet haven't heard anything back. > > As that's a bit ridiculous I just moved the BlueOnyx mailing list > server to another IP address for the time being. Barracuda has now blacklisted the new IP as well. This is ridiculous. Only explanation: Someone who is subscribed to this list is reporting the list emails as SPAM to Barracuda. -- With best regards Michael Stauber _______________________________________________ Blueonyx mailing list Blueonyx@mail.blueonyx.it http://mail.blueonyx.it/mailman/listinfo/blueonyx _______________________________________________ Blueonyx mailing list Blueonyx@mail.blueonyx.it http://mail.blueonyx.it/mailman/listinfo/blueonyx