Considering that my organization uses the tool extensively, I think that the stability of the tool is average. Stability-wise, I rate the solution a five or six out of ten.

The stability is rated and eight out of ten. 

We have not had a lot of issues. There have been minor hiccups, but nothing has caused our system to crash causing us not to have email access for hours or days. There may be certain features that may have been disabled.

I rate the stability of IceWarp an eight out of ten.

The solution is stable, but running features sometimes stop if we make a mistake when adding new users. Often there is no use case completed by development before being directly released. Bugs seem to be what stop running features. 

Stability and reliability in all services is excellent.

Stability is excellent.

Over the 15 years, there have of course been bugs/issues on our server, but we were always able to rely on IceWarp. There have been some bugs that were difficult to find, but together we found and fixed them!

IceWarp is a stable solution.

It has been a fairly stable platform.

No, I have 300 accounts (250 active) and it works perfectly.

This solution is stable we have not had any issues.