On 12/15/2020 5:17 AM, Jeff Abrahamson wrote:
The received mail had headers that looked like this:
...
Received: from p27.eu (unknown [185.222.57.81])
by nantes-1.p27.eu (Postfix) with ESMTP id 8AFC8FF74D
for ; Tue, 15 Dec 2020 11:58:03 +0100 (CET)
One safe thing you
Dnia 15.12.2020 o godz. 19:01:34 Benny Pedersen pisze:
>
> reject local domains in envelope sender is safe
The only case when this may cause trouble is when someone with mail account
outside your domain (say u...@isp.net) is forwarding mail to your domain
(say to us...@yourdomain.com), and you se
On Tue, Dec 15, 2020 at 06:50:59PM +0100, Michael wrote:
> On Tuesday, December 15, 2020 5:57:45 PM CET, Benny Pedersen wrote:
> > Why do you accept your own domain in port 25 as envelope sender?
>
> Because I want to receive my own posts in this or any other mailing list.
Mailing lists as postfi
Michael skrev den 2020-12-15 18:50:
On Tuesday, December 15, 2020 5:57:45 PM CET, Benny Pedersen wrote:
why do you accept your own domain in port 25 as envelope sender ?
because i want to receive my own posts in this or any other mailing
list.
envelope sender is not mail from
, you should r
On Tuesday, December 15, 2020 5:57:45 PM CET, Benny Pedersen wrote:
why do you accept your own domain in port 25 as envelope sender
?
because i want to receive my own posts in this or any other mailing list.
, you should reject this
only if you want to prevent receiving your own post to thi
Jeff Abrahamson skrev den 2020-12-15 12:17:
I received an obvious fishing mail today from ad...@p27.eu (my own
domain). I appear not to be running an open relay (say the sorts of
websites that offer to check these things), and yet this happened:
why do you accept your own domain in port 25 as
On 2020-12-15 Jeff Abrahamson wrote:
> On 15/12/2020 12:36, Ansgar Wiechers wrote:
>> Spoofing the envelope from address (Return-Path: ) is
>> actually valid (per the SMTP protocol) and a common occurrence for
>> mail sent by bad actors.
>
> Is prohibiting spoofing envelope from recommended? I'm n
On 15/12/2020 12:36, Ansgar Wiechers wrote:
> On 2020-12-15 Jeff Abrahamson wrote:
>> I received an obvious fishing mail today from ad...@p27.eu (my own
>> domain). I appear not to be running an open relay [...]
>>
>> Am I reading this wrong? Why was that able to happen? I would have
>> expected
On 2020-12-15 Jeff Abrahamson wrote:
> I received an obvious fishing mail today from ad...@p27.eu (my own
> domain). I appear not to be running an open relay (say the sorts of
> websites that offer to check these things), and yet this happened:
>
> Dec 15 11:58:03 nantes-1 postfix/smtpd[31118
I received an obvious fishing mail today from ad...@p27.eu (my own
domain). I appear not to be running an open relay (say the sorts of
websites that offer to check these things), and yet this happened:
Dec 15 11:58:03 nantes-1 postfix/smtpd[31118]: warning: hostname
hosted-by.rootlayer.ne
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