And another example:
Dec 10 14:13:47 scheer postfix/smtpd[934]: connect from lb3-smtp-cloud3.xs4all.net[194.109.24.30]
Dec 10 14:13:47 scheer postfix/smtpd[934]: 6316C21123: client=lb3-smtp-cloud3.xs4all.net[194.109.24.30]
Dec 10 14:13:47 scheer greylisting filter[944]: Starting greylisting...
Wow, I'm currently expecting some major mailproblems on my server. All received mails are removed on arrival. Here's a bit out of my /var/log/maillog:
Dec 10 14:00:31 scheer postfix/smtpd[421]: connect from smarthost.drukwerkdeal.nl[195.60.212.152]
Dec 10 14:00:31 scheer postfix/smtpd[421]...