Better tools for kernel developers
Better tools for kernel developers
Posted Feb 7, 2020 11:42 UTC (Fri) by meyert (subscriber, #32097)In reply to: Better tools for kernel developers by mpr22
Parent article: Better tools for kernel developers
Posted Feb 7, 2020 12:01 UTC (Fri)
by Karellen (subscriber, #67644)
[Link] (3 responses)
Port 25 can also be used, as it was used for years, and can still be used, by all email servers that I am aware of, as the client-to-server email submission port.
Port 587 is completely redundant. It even uses the exact same protocol as that which runs on port 25. You can just set up your firewall rules to translate traffic on port 587 to port 25, and email submission will still work without any other changes. Just use port 25.
Posted Feb 7, 2020 18:37 UTC (Fri)
by anselm (subscriber, #2796)
[Link] (1 responses)
The advantage of using port 587 for client submission is that as a mail server operator you get to apply a different set of policies to connections on that port. For example, submitting e-mail on port 587 often requires the STARTTLS and SMTP-AUTH features (among others), which you can't insist on for server-to-server e-mail delivery on port 25.
In point of fact, various ISPs block clients from accessing TCP port 25 anywhere on the Internet, and force them to submit e-mail on the ISP's own mail servers on port 587 with encryption and authentication (and possibly rate-limited), as a spam-reduction measure.
Posted Feb 7, 2020 19:23 UTC (Fri)
by rgmoore (✭ supporter ✭, #75)
[Link]
I think this gets to the core problem with email as a tool: it no longer works the way people expect it to. Spam and the responses to spam have fundamentally broken email. It is no longer easy to set up a server that reliably communicates with the rest of the world. Demanding that developers use a particular email setup in order to work on the kernel is thus a serious barrier to entry.
Posted Feb 11, 2020 10:44 UTC (Tue)
by nim-nim (subscriber, #34454)
[Link]
Better tools for kernel developers
Better tools for kernel developers
Better tools for kernel developers
In point of fact, various ISPs block clients from accessing TCP port 25 anywhere on the Internet, and force them to submit e-mail on the ISP's own mail servers on port 587 with encryption and authentication (and possibly rate-limited), as a spam-reduction measure.
Better tools for kernel developers