> On 2023-04-12 15:30, Wietse Venema via Postfix-users wrote:
Fourhundred Thecat via Postfix-users:
> On 2023-04-12 14:48, Byung-Hee HWANG via Postfix-users wrote:
The smtp_helo_name used in the Postfix SMTP client should resolve to the
client IP address that is seen by a remote SMTP server.
Thus, setting smtp_helo_name=$mydomain may appear to work when your
domain has only one machine that sends email, but it does not work
well when there are multiple machines.
OK, I see.
So should the client (mail.example.com) then have it's own SPF record,
in addition to the domain itself (example.com) ?
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