On 27-1-22 11:30, Alessandro Vesely via mailop wrote:
On Wed 26/Jan/2022 09:03:11 +0100 Mailop wrote:In general, there are also a lot of other _dmarc. records, that have e-mail addresses that doesn't work and generate undelivered messages.Yes. I coded a way to exclude bouncing addresses, but then never set it up. On the one hand, they are not so many, roughly less than 10%. On the other hand, since outgoing reports happen to be as interesting as incoming ones, I CC them to my collector. And sending reports to myself only feels rather nonsensical.
I did code a suppression mechanism for bouncing report addresses. aliexpress dmarc reports have been bouncing continuously since mid 2020. At least at the moments that we tried to send a report. They are now on suppression level "13 weeks", which is also the maximum. Which means we'll only try to send a report once every 13 weeks (about 3 months), and junk all of the rest. But if we're carping about bouncing dmarc reports, can I give a dishonorable mention to [email protected]? They have "only" been bouncing reports since september last year, but they receive reports for hundreds of domains. I have recorded bounces for about 20% of the destinations that we send DMARC reports to. 7% of the destinations are currently on the active "suppression list" because of this. Oh, and then there are a number of ticket systems or mailinglists behind dmarc reporting addresses that usually reply with something like 'Your email to our support system could not be accepted". Usually in such a way that it's near impossible to get the original destination address out automatically. Whenever I have some time, I tend to go through some of those bounces and plonk the corresponding domains for a whole year. -- Jan-Pieter Cornet <[email protected]> "Any sufficiently advanced incompetence is indistinguishable from malice." - Grey's Law
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