Am 22.07.24 um 19:31 schrieb Alessandro Vesely:
non-existing rua= addresses generate loops, because the target domain sends a bounce, and on the next day the generator sends them a report for that one message. The report bounces, and so forth...
Hello, when we started sending aggregated reports (as a not so small ISP), we noticed the real world behavior... Our aggregated reports - contain a header "Auto-Submitted: auto-generated" - contain a header "Precedence: bulk" - contain a header "X-Auto-Response-Suppress: DR,RN,NRN,OOF,AutoReply" - are transferred to the MX using RFC 3461 syntax "RCPT TO:<[email protected]> NOTIFY=NEVER" guess, what happen: - rua-address may be root@localhost - rua-address may be invalid syntax - rua-address@$domain may be an unknown user at $domain - we get late bounces, saying rua-address@$domain could not be delivered to postmaster@mta.$domain - many german sparkasse domains answers "thanks, we received your message" :-/ So, we implemented some kind of bounce processing and suppress sending aggregated reports for some weeky if we receive response for $report-domain. This prevent constantly sending reports to a known broken address but also give the recipient the opportunity to fix it's broken state some day. Andreas _______________________________________________ dmarc mailing list -- [email protected] To unsubscribe send an email to [email protected]
