I haven't run into that problem, but yes, it's possible.
One problem I did run into was “allowed number of outgoing emails”. If you use groups in DeltaChat, even a small grouop of say 10 members will incur a lot of outgoing messages. The provider I originally used has a limit of 200 emails per day, so that was a showstopper.
If you use DeltaChat's chatmail server (which will happen per default if you don't provide an email account of your own), this will not be a problem.
One problem I did run into was “allowed number of outgoing emails”. If you use groups in DeltaChat, even a small grouop of say 10 members will incur a lot of outgoing messages. The provider I originally used has a limit of 200 emails per day, so that was a showstopper.
If you use DeltaChat's chatmail server (which will happen per default if you don't provide an email account of your own), this will not be a problem.