Hi All,

Greetings!

Our mail server configured Postfix version 2.4.5 with mailmarshal as content 
filter, recently mail server not responding because of huge mail queue, content 
filter cpu usage is 100%, my investigation found more than 18k mails are in 
que, sender email address is m...@zbavitu.net 


I have manually deleted mails in content filter queue and deferred mails in 
mail server, now mail server functioning normally.

I wanted to investigate weather our mail server compromised  or content filter 
(windows machine) infected. 

Please suggest methods to investigate so that will take precautions in future 
the same will not repeat. 

I would like to know how to load balancing  mail server, due to above issue 
mail server was down for 24 hours, we have secondary mx which queues mails when 
primary mx is down, Is there any method where users can send or receive mails 
from secondary mx when primary is down.


Thanks for suggestions.

Regards,
Ramesh  

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