On Thu, Apr 20, 2017 at 10:24:14AM +0200, Joris Vanhecke wrote:
> Hey guys,


> I have set up an OpenSMTPD server to use as mailing server for corporate
> spam and phishing simulations.
> The server will typically get a bunch of emails (50-1000) to be sent to
> the same domain.
> Are there any configuration options that will help optimize this
> use-case?

Yes, but I'm not too keen on describing them because I assume someone
who is in the business of sending mails must have a proof-of-work and
must figure out by reading the code ;-)

> Currently I'm experiencing two issues:
> The target mailserver drops mails because too many are sent (around
> 100).
> (I guess a whitelist on target server is best solution, but limiting
> outgoing speed could be easier?).
> OpenSMTPD is blocking my client that is sending mails with:
> 452 4.5.3 Too many recipients: Too many messages sent
> Especially the last one is an issue for me.
> Current config:
> listen on lo tag TO_DKIM hostname $domain mask-source
> listen on lo tag FROM_DKIM port 10029 hostname $domain
> accept tagged TO_DKIM sender "@$domain" for any relay via
> smtp:// hostname $domain
> accept tagged FROM_DKIM for any relay hostname $domain


Gilles Chehade

https://www.poolp.org                                          @poolpOrg

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