Blocking E-Mail By Sender Domain using Sun Java Messaging Server
With the Sun Java Messaging Server, you can block inbound mail based on the senders E-Mail domain (as self-reported in their E-Mail), also known as their From: address. In the example here, I want to block all inbound email with a From: address from Zambia (TLD: .za). It doesn’t matter where in the world it is sent from, any inbound E-Mail that is said to be from a .za domain will get blocked automatically.
In order to keep my mappings file (/opt/msg/msg-test/config/mappings) more readable, and to keep the items organized, I created a file of domains that I block, and include it in my mappings file in the right section. I named my file /opt/msg/msg-test/config/orig_send_access_block.txt .
I do an include of the file in the ORIG_SEND_ACCESS section of the mappings file. It is the first content line, as such:
ORIG_SEND_ACCESS
</opt/msg/msg-test/config/orig_send_access_block.txt
tcp_local|*|tcp_local|* $N$D30|Relaying$ not$ allowed
The contents of the orig_send_access_block.txt file are as follows (each line is indented 2 spaces):
tcp_local|*.za|*|* $NNo$ thank$ you$ Zambia
I ensured the files were readable by the id that runs Sun Java Messaging Server, then re-compiled and restarted the imsimta dispatcher.
./imsimta cnbuild
./imsimta chbuild
./imsimta restart
