I bet most IT Administrators have come across where they get below returned mail error message after sending an email to their business partners or client;
This is the mail system at host mail.xxxxxxxxxxxxxxx.com.
I'm sorry to have to inform you that your message could not be delivered to
one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can delete your own
text from the attached returned message.
The mail system
using Trend Micro oRBL+. Please see
to RCPT TO command)
*** firstname.lastname@example.org- an example
** 220.127.116.11- an example
When you go to www.mail-abuse.com you will be directed to Trend Micro who owns mail abuse and when you do a look up of the listed ip Address, you will find its there. No matter how many times you try to remove your IP, it won’t go away, Writing to them still doesn’t help. This is when you call your ISP and they tell you your computers are spamming. After you check your LAN computers you realize all are ok and none is spamming.
The scenario is the business/client partner you were contacting is a registered user of Trend Micro, I haven’t got to explain this but somehow your IP address gets picked, at one time, it will. Even after 2 years but it will be picked during your normal mail exchange. Note that this IP address is not internal assigned computer addresses but that gateway IP address given by your ISP, so as much as they will try to tell you to take on the process of removal, its upto them to facilitate this. Usually it will take you 72 hours to starting getting response from Trend micro and sometimes forever to get it fixed. Solution, your ISP must give you another IP Address, or you should switch ISPs or, I like this one, go Google Apps or use gmail or yahoo to send your mail temporally as you ‘patiently’ wait for it to be resolved.
Reference sites, Go below
Black listed web site look up
Reason why your ISP should resolve this
Enjoy the rest of the day