Hi all,
I'm guetting a big problem on my server.
From 1 week until now I got 4 spam attacks. The attacker is the same, because the emails sent are iqual.
The tecnique is also the same, they use an email account (compromissed password) and send emails through smtp server.
When I detect the attack, i do:
1. identify the compromised account
2. Change password from the compromised account
3. Stop qmail
4. Clear queue with qmail-remove
5. Start qmail
The problem is that they already used 4 diferent domains since the first attack.
So, here is my problem, how do they discover the passwords?! How can I solve this problem? I have hundreds of emails accounts and can't change it all.
CentOS release 5.10 (Final)
Plesk 11.0.9
Thanks for the help
I'm guetting a big problem on my server.
From 1 week until now I got 4 spam attacks. The attacker is the same, because the emails sent are iqual.
The tecnique is also the same, they use an email account (compromissed password) and send emails through smtp server.
When I detect the attack, i do:
1. identify the compromised account
2. Change password from the compromised account
3. Stop qmail
4. Clear queue with qmail-remove
5. Start qmail
The problem is that they already used 4 diferent domains since the first attack.
So, here is my problem, how do they discover the passwords?! How can I solve this problem? I have hundreds of emails accounts and can't change it all.
CentOS release 5.10 (Final)
Plesk 11.0.9
Thanks for the help