Might be DNSWL, where TOL lists it‘s mailservers so people can overcome the frequent spamcop listings etc.
I doubt anyone from Gmail reads here. Otherwise: wtf guys? How about stopping the #1 worldwide nigeria spam facilitation? They can’t pay that good. Greets, Ludi Von: owner-postfix-us...@postfix.org <owner-postfix-us...@postfix.org> Im Auftrag von Piper H Gesendet: Dienstag, 7. Dezember 2021 12:56 An: Postfix users <postfix-users@postfix.org> Betreff: what's best guess record for SPF I sent an email from my t-online.de <http://t-online.de> account to gmail. Gmail shows SPF pass by best guessing: Received-SPF: pass (google.com <http://google.com> : best guess record for domain of x...@t-online.de <mailto:x...@t-online.de> designates 194.25.134.18 as permitted sender) client-ip=194.25.134.18; And t-online.de <http://t-online.de> has no SPF setup for which you can check from their domain. So what's the best guess record by google? Thanks in advance. Piper