On Sat, Nov 16, 2024 at 05:17:39PM +1100, Phil via Postfix-users wrote:
> > > Is default_extra_recipient_limit not limiting the number of recipients in
> > > a
> > > given message ?
> >
> > No. And, what did you have in mind anyway?
> >
> > - Limiting the recipient count of incoming SMTP message envelopes?
> > - Limiting the recipient count of outbound SMTP deliveries
> > (splitting the envelope for larger messages by doing multiple
> > deliveries each with at most that many recipients)?
>
> My concern is a customers trying to send email to 100s of recipients and
> getting blocked for bulk mailing so
>
> - Limiting the recipient count of outbound SMTP deliveries
The default limit is 50.
$ postconf -d default_destination_recipient_limit
default_destination_recipient_limit = 50
The customer can still send mail to 100s of recipients, you'll just
deliver such messages as multiple "envelopes", 50 at a time.
So a 1000 recipient message will result in 20 deliveries (if all to the
same nexthop).
--
Viktor.
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