BPMN: Confusion about if an event will 'definitely' happen or if it 'might' happen

If there is an event saying “Send Message”, which has an event in dotted lines with an email sign and an event attached to this email (in another pool), but the event “Send Message” also has a parallel gateway attached to it, will the even in the other pool always happen even though there is parallel gateway also attached to the original event?

Can you show a sample diagram for your question?

Where the line between the email and the event “send message to customer” is dotted to indicate a message being sent (I didn’t know how to do this).

Did you mean something like this?


I am not sure if your question is about the BPMN standard or execution on a specific engine.

Yes, I did mean exactly this.