Still... I guess even #DeltaChat communications would fail me if the data center of my ChatMail server would be affected by a power cut, right? Or is there some kind of redundancy?

No idea how accidental this #blackout is, but it's a good chance to think how to make your mobile phone still useful when a bunch of servers (including your default ones) go off.

yes, currently if your chatmail or email servers fails you wouldn't be able to get messages.

The reason why #deltachat might work better is because it has been optimized to work in bad networks where states are intentionally trying to disrupt communications. Maybe the power outage in spain causes more random network behaviour (eg DNS failures) which delta is pretty prepared to deal with. In any case thanks for the notice and all the best with restoring power!

I've noticed that some of these messages didn't arrive instantly, so perhaps what also happened is that DeltaChat users could see and reply to messages while being intermittently online/offline, regardless of when messages actually were received and sent in the background. Maybe other services aren't as responsive (or users don't feel them as responsive) when the connection is not 100% online?

(I really don't know what I'm talking about. I hope this helps.) 😅

it's guess work also on our side here. If you happen to get any more info at some point please let us know :)

I've just have received a batch of messages from a friend with a timestamp from 5 and 2 hours ago. This is consistent with the idea that the messages are queued locally until the connections is reestablished.

In those messages from hours ago my friend says that WhatsApp or even play mobile phone calls aren't working at all -- no mobile communications.

What might happen also is that in such event millions of people reach out to WA servers simultaneously and insistently, which won't help.