[pfx] Re: Trying to limit the number of users per connection and the number of concurrent connections to one domain

[Paul Tomblin via Postfix-users]

On Sat, Jun 27, 2026, at 12:23 AM, Viktor Dukhovni via Postfix-users wrote:
> On Fri, Jun 26, 2026 at 04:00:00PM -0400, Paul Tomblin via Postfix-users 
> wrote:
>
>> > - Provide proof that the slow_smtp transport is handling those
>> > messages. 
>> 
>> 2026-06-26T17:58:26.784276+00:00 mail postfix-slow/smtp[1046598]: 89A2C82E43:
>>   to=<cbenzi...@rochester.rr.com>, 
>> relay=pkvw-mx.msg.pkvw.co.charter.net[47.43.26.7]:25,
>>   delay=1.2, delays=0.3/0.05/0.35/0.52, dsn=2.0.0, status=sent
>>   (250 2.0.0 dAorwNQVCzLiadAoswI9Zm mail accepted for delivery)
>> 2026-06-26T17:58:26.784455+00:00 mail postfix-slow/smtp[1046598]: 89A2C82E43:
>>   to=<cdelv...@rochester.rr.com>, 
>> relay=pkvw-mx.msg.pkvw.co.charter.net[47.43.26.7]:25,
>>   delay=1.2, delays=0.3/0.05/0.35/0.52, dsn=2.0.0, status=sent
>>   (250 2.0.0 dAorwNQVCzLiadAoswI9Zm mail accepted for delivery)
>> 2026-06-26T17:58:26.784528+00:00 mail postfix-slow/smtp[1046598]: 89A2C82E43:
>>   to=<cra...@rochester.rr.com>, 
>> relay=pkvw-mx.msg.pkvw.co.charter.net[47.43.26.7]:25,
>>   delay=1.2, delays=0.3/0.05/0.35/0.52, dsn=2.0.0, status=sent
>>   (250 2.0.0 dAorwNQVCzLiadAoswI9Zm mail accepted for delivery)
>> ...
>
> Well, the recipient limit is 5, that's three recipients delivered in 
> one envelope.  
> Are there in fact larger batches?

The three dots are where I cut it off. The `mailq` command confirmed that all 
46 people with RoadRunner addresses were being sent in one block.

Do you want to see all 500-ish members of the mailing list?

-- 
Paul Tomblin
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