[balanc]

I think any competent email provider will throttle or block you the first time you send a burst of messages.

[gausswho]

Wait, is that true over regular email too? Say I have a back and forth one liner emails every few minutes? It's competent for the provider to throttle or block these?

[robjan]

They do. All email providers have limits either specified or unspecified. It's usually a few hundred per hour and each recipient uses one quota.

[sam_lowry_]

This is why they provide a choice to use their own servers

[balanc]

Then why implement email as a backend if email cannot actually be used as a backend?

[kseistrup]

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.