On Thu, 19 Mar 2026 14:48:16 -0400 (EDT) Wietse Venema via Postfix-users <[email protected]> wrote:
> > # Single MX record that resolves to multiple IP addresses > > local-data: "example.com. MX 10 smtp.example.com." > > This works because the Postfix SMTP client randomizes the order of > equal-preference IP addresses. So in this specific case, even if DNS server returns multiple IP addresses for the MX host always in the same order, Postfix proactively shuffles them in random order? I think most other applications just grab the first IP address from the top of the list. I wonder if having multiple MX records with the same priority may result in more consistent behavior across a variety of different SMTP clients, as this is explicitly stated by SMTP protocol? _______________________________________________ Postfix-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
