Author: Peter Velan Date: To: Exim Users Mailing List Subject: Re: [exim] Blocking non-authenticated senders
am 20.02.2007 16:50 schrieb David Woodhouse: > On Tue, 2007-02-20 at 15:38 +0100, Peter Velan wrote:
>> I don't see a situation where a foreign server sends me a legit email
>> with envelope-from = "localpart@???"?
>
> If there is any external email address for which email is just
> automatically forwarded to your systems, and if any of your users send
> mail to that address, then it'll happen.
Hmm, I will check this very, very carefully.
>> > - your mail server in turn rejects the forwarded mail because it was
>> > not sent via SMTP AUTH
>> > - your user will receive an error mail from the forwarding mail server
>> >
>> > I would stongly recommend not to implement this kind of blocking.
>>
>> If the scenario you described above is real, then for sure, it would be
>> a stupid thing to implement this!
>
> It's very real; it's very stupid :)
Well, I will take a very close and thorough look to my mainlog-files
before doing such a stupid stupid thing.
