SmarterMail Build 8531

Hello, friends,

May I ask for your advice, please?
Beginning about a month ago, in April or so, my SmarterMail server has been attacked by Brute Force and Denial of Service attacks, coming from IPs in Iran, the Netherlands, Romania, and so on. My users are beginning to get worried, and I am not sure what to do.

Users sometimes are locked out of their own SmarterMail web mail, because the external attackers have bruteforced their usernames. Ugh! This has never happened in my many years of using SmarterMail.

I attach my current IDS Block settings; do they look OK to you?

Is there anything else you suggest to stop these attacks?

Thank you as always for your help.

Eric