Hi there, In our ISPConfig 3.2.12p1, installed with autoinstaller script on Debian 12, some incoming emails are rejected with log message below: Code: 2024-12-23T14:03:59.855617+00:00 mail2 postfix/cleanup[3357886]: 7131010861ED: milter-reject: END-OF-MESSAGE from mibc-fr-02-out-06.mailinblack.com[137.74.84.139]: 4.7.1 Try again later; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<mibc-fr-02-out-06.mailinblack.com> It seems to be a greylisting behavior, but no greylisting is enabled on this mailbox as we already use a third party greylisting service which sends filtered emails to our server. Does anybody knows how I can make it accept all the incoming emails without manually adding them in whitelist? Thanks a lot
Greylisting is part of Rspamd spam filter. If an email gets a score between 'ok' and 'ban,' the Rspamd puts it into greylisting. Disabling this will likely result in worse filter results if you reject a questionable email instead of greylisting it. You can find more info about how Rspamd works here: https://rspamd.com/doc/modules/greylisting.html
Thank you Till. There is something I don't understand... You mean that Rspamd is acting, even if Spamfilter is "- not enabled -" and "Enable greylisting" checkbox is unchecked? If so, is there another way to do it, like raising the greylisting score for example? I'm 100% sure of incoming mails as they already pass through a third party greylisting service which sends us the legitimate emails via its own smtp.
