Do you have OpenBSD spamd(8) (Not spamassassin) working? It provides greylisting by default, you can try to disable greylisting in spamd(8).
Reference: Manual page of spamd(8)
Do you have OpenBSD spamd(8) (Not spamassassin) working? It provides greylisting by default, you can try to disable greylisting in spamd(8).
Reference: Manual page of spamd(8)