Re: [mailop] hetzner and the btinternet.com blacklist

2017-07-12 Thread Felix Schwarz via mailop
Hi guys, thank you very much for all the input. Seems like SMTP proxies/smarthosts + port 25 blocks/connection counting might be good for something. However I really hope that breaking up TLS connections will never get a routine practice. I mean we are fighting this for years now with all these s

Re: [mailop] hetzner and the btinternet.com blacklist

2017-07-11 Thread John Levine
In article <1499809822.14353.11.ca...@ns.five-ten-sg.com> you write: >> Doesn't matter -- the "transparent" filters force all of the >> connections to the provider's filtering host, so if there's a TLS >> connection, it terminates at the filtering host. > >That sort of proxy will break some of your

Re: [mailop] hetzner and the btinternet.com blacklist

2017-07-11 Thread Carl Byington
-BEGIN PGP SIGNED MESSAGE- Hash: SHA512 On Tue, 2017-07-11 at 19:50 +, John Levine wrote: > Doesn't matter -- the "transparent" filters force all of the > connections to the provider's filtering host, so if there's a TLS > connection, it terminates at the filtering host. That sort of

Re: [mailop] hetzner and the btinternet.com blacklist

2017-07-11 Thread John Levine
In article <9cdac510-4000-56f3-f919-8c5f1edaf...@schwarz.eu> you write: > >Am 10.07.2017 um 21:45 schrieb John Levine: >> Many other hosting companies manage to control their spam. The usual >> approach is to filter the mail their customers send, either with >> "transparent" filters hijacking port