This morning I discovered that the whole world was blocked to send mail to my servers… 
So I start digging into the /var/log/maillog stuff and guess what… I used the ORDB.ORG databases and ORDB stopped with their services… and I could have know it, because I had read the article… but didn’t realize that I use their services to. 
So I reconfigures my e-mailservices and at this moment the blocked e-mails are comming slowly in, at the end of the day I hope everthing is in. Next you find a summary of blocked hosts caused by the described problem:
