Brent, back from Spain, and probably out of sync:
Patrick Kaell a écrit :
Eric Dondelinger wrote:
I've got LuxDSL. I constantly send mail from
here with other
domains than pt.lu. mailsvr.pt.lu relays it for me - as I'm
on the P&T network. As you know about SMTP servers, I'll just
say "smarthost".
Now, mail coming from mailsvr.pt.lu do not need to be from a @pt.lu
address, right? It can be @sex.com and so on? Until now it was enough
to block dialup address ranges in a Black List. Now it is neccessary
to add mailsvr.pt.lu to the Black List, to be protected? A worm on
your PC can send a mail to anybody using anybody's mail address using
mailsvr.pt.lu. And the worm does not need to be ultrasmart to find the
hostname mailsvr.pt.lu in the config files of your mail client.
Eric is right: "mail coming from mailsvr.pt.lu do not need to be from a
@pt.lu address". Plan-Net has customers using also EPT mail servers, and
I confirm this works. The protection you have is that EPT closes access
to e-mail services to customers emitting large amount of e-mails. I
don't know how they detect it, but they indeed switch off e-mail
forwarding services to identified customers that are suspected to have
e-mail worms or are abusing the e-mail service (spamming). I had a
customer complaining to Plan-Net about this, and it was verified as
being done by EPT. They even send an e-mail to the customer to ask him a
cleaning of his computer before requesting the re-opening of his e-mail
service.
That's how it works right now, and I think it's not so bad. For sure,
it's not the silver-bullet against spams, but who has that silver bullet ???
--
Brent Frère
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