Smtp Stopped Suddenly

[adilalpman]

We have used plesk 7.5.4 on debian 3.1. But we have a big problem till we install the plesk on this system. Smtp stopped suddenly a lot of time, than when we try to start it via plesk service management section it can start without any problem. When we check logs about that, we cant find any input about that.

Has anybody got this problem and who knows how can we resolve it?

Plese help mee...