Hi it looks like the current ruggedinbox VPS is not able to handle the current load. RAM is not enough.
We are talking about 1GB for few thousand users

We already tweaked all we could (database, antivirus, smtp/pop/imap stack), it was interesting to find the limit but now we must upgrade.
So we are planning to move the services to a bigger VPS.
A number of users told us that they would like to contribute, so we are accepting donations in bitcoins.
Every penny will be spent for the VPS, which price is 18 euros per month.
The bitcoin address for donations will never change, so it will be easy to calculate for how many months we are ok.
The BTC address is: 1PHnN2SjiLbQsL9eohC1DDyYV8CPfaPu47
Thank you!
Thank you for the update and the service. I will send some BTC your way when I am able.