Email rejected by RBL

Date: 6 Feb 2013

Details:
It appear that some of our host reject incoming email traffic with a RBL rejection.

Effect:
The email will fail to reach recipient. Sender will receive a bounced back email.

Sample bounced back email body:
Reason: Remote SMTP Server Returned: 550-"JunkMail rejected - (mail.domain.com) [xxx.xxx.xxx.xxx]:12345 is in an
550 RBL, see "

Resolution:
We stop refer to RBL that is having issue.