Re: [Mailman-Users] DNS error behaviour with DMARC

2014-08-28 Thread Jim Popovitch
On Wed, Aug 27, 2014 at 11:54 AM, Jeff White wrote: > 2. What is Mailman's behaviour if the query fails (e.g. times out)? The msg is passed through as if there was no DMARC check. (Yes, it's known that it is possible for a miscreant to DDoS domain.tld's DNS servers and then send you an email Fro

Re: [Mailman-Users] DNS error behaviour with DMARC

2014-08-27 Thread Barry S. Finkel
On 8/27/2014 10:54 AM, Jeff White wrote: With dmarc_moderation_notice set to anything but "Accept" Mailman will do a DNS query for every message that comes in and check the DMARC record of the sending domain. I have two questions regarding this: 1. Has anyone on this list noticed any performanc

[Mailman-Users] DNS error behaviour with DMARC

2014-08-27 Thread Jeff White
With dmarc_moderation_notice set to anything but "Accept" Mailman will do a DNS query for every message that comes in and check the DMARC record of the sending domain. I have two questions regarding this: 1. Has anyone on this list noticed any performance issues with the overhead this adds?