On Tue, Feb 06, 2024 at 10:27:17PM -0500, Ken Wright via Postfix-users wrote:
> I honestly don't know if this is an issue with Postfix or Roundcube,
> but I thought I'd start here.
>
> I'm running Postfix 3.8.1 on Ubuntu Server 23.10 and I'm hosting a
> friend's website and email in addition to my own. My problem is, my
> friend (who usually accesses her email on her phone via Roundcube) is
> unable to send email, getting a 451 error when she tries. She can
> receive emails without difficulty. I am able to send and receive
> emails, both through a conventional mail client (Evolution) and the
> Roundcube webmail interface. I know there are ways to throttle
> Postfix, but I can't find them in either main.cf or master.cf. Can
> anyone offer any insights?
Curious anecdote (je suis désolé), but if you're looking for help, and
not sympathy:
http://www.postfix.org/DEBUG_README.html#mail
--
Viktor.
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