Can somebody help me with this.
Some of the users are receiving a message:
Generating server: exchsrv.MYCOMPANY.LOCAL
#550-"JunkMail rejected - mail.mycompany.rs (mail.mycompany.co.rs) 550-[89.216.xxx.xx]:2538 is in an RBL, see 550 http://www.spamhaus.org/query/bl?ip=89.216.xxx.xx
Problem is that :
1. our mail server is not open relay
2. our mail server have spam and antivirus protection
3. I checked our mail server and it doesn't have spam/virus trojans
4. our external IP is a firewall/gateway IP, and firewall is configured to prevent outbound port 25 connections to the Internet except from my mail server (exchange 2007)
I have analyze problem and saw that we were listed in CBL late at night when we recived mail from our client externalclient2@externaldo
This mail was sent to our mail-enabled Universal group in which there was an another external mail contact from our exchange server (externalcontact@externald
I have checked reputation look up for the externaldomain2.com and it was poor.
Entire configuration of my domain and mail server perfectly was working approximately one year and we have never had similar problems.
Can you help me with this because i don't know what to do if they black list my IP again?