Carlos E. R. wrote:
On 21/09/2018 02.10, Per Jessen wrote:
Carlos E. R. wrote:
On 20/09/2018 15.09, Per Jessen wrote:
Carlos E. R. wrote:
On 20/09/2018 12.57, Knurpht-openSUSE wrote:
Op donderdag 20 september 2018 18:50:21 CEST schreef Carlos E. R.: > On 20/09/2018 11.39, Per Jessen wrote: >> Carlos E. R. wrote: >>> On 20/09/2018 10.28, Per Jessen wrote: >> [snip] > I find blocking 25 intrusive on my freedom.
Well, don't blame the ISPs, blame the spammers that made them block 25. Years ago when my ISP started blocking they sent out a nice letter, explaining why. I could live with that. FWIW, their Enterprise programs do have 25 open.
Well, Telefonica did not, and there are spammers everywere.
T-Mobile (USA) doesn't.
Mobile operators, tmk, don't really have any significant problem with mobile phones being hijacked and abused. (trojans).
Then it is not a real policy issue.
Policy? No, I don't think it is a policy issue, it's simply about an easy and practical way to prevent lots of spam being sent.
You only need to block relay use. Ie, nobody can relay without a password, no matter the port.
Public mail servers, such as those receiving mails for "jessen.ch", "gmx.es", "opensuse.org" etcetera, have a port 25 open, for everyone. They cannot tell who is going to want to transfer some mail to them, they _must_ accept everyone, also a script-kiddie or a hijacked PC behind a Telefonica ADSL line. There is _no_ authentication involved, there is _no_ open relaying involved. In your case, by Bell blocking _outgoing_ port 25, they are putting a very effective stop to the script-kiddies and the hijacked PCs. As does Bluewin and numerous other Swiss and European providers. -- Per Jessen, Zürich (14.6°C) http://www.hostsuisse.com/ - dedicated server rental in Switzerland. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org