On 21/09/2018 15.01, Dave Howorth wrote:
On Fri, 21 Sep 2018 20:50:48 +0200 Per Jessen <per@computer.org> wrote:
Carlos E. R. wrote:
On 21/09/2018 13.48, Per Jessen wrote:
Carlos E. R. wrote:
If a mail relay server wants to send mail to someone@example.com, it connects to inbound.example.com:25 without authentication.
If it wants to send email to someone@otherexample.com and connects to inbound.example.com:25, authentication will be requested.
No, never. Provided 'example.com' and 'otherexample.com' both belong to customers of ours,
No, they don't :-) They belong to different providers.
I have no idea what you are talking about. Providers are irrelevant here.
Obviously, if 'example.com' belongs to my customer#4567 and and 'otherexample.com' does not belong to any of my customers, I accept the first and reject the latter. No authentication involved.
As you say, I think you're at cross-purposes. I think Carlos is talking about a mail server that accepts incoming mail from its customers and delivers them to whoever. While you're talking about a mail server that accepts mail from wherever and delivers them to its customers.
Yes, you got it right. Clients or users of that system, the denomination is irrelevant. People which get the email using that server. If providers is the incorrect word then replace with mail server. Whatever, call it X.
But then, I'm no expert on this subject. PS hope I got the quotation levels right.
-- Cheers / Saludos, Carlos E. R. (from openSUSE 15.0 (Legolas))