On Tue, 18 Jun 2024 at 08:55, Jeff Peng <j...@tls-mail.com> wrote: > I did have tried this line (with just one value > reject_sender_login_mismatch). > But then I even can't send mail from the valid user (the user who login > into RC). >
Oh, sorry I didn't see you weren't using smtpd_sender_login_maps. I'm pretty sure you'll need that to list the allowed logins (and/or their aliases if needed). See https://www.postfix.org/postconf.5.html for how that works.
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