I'm using Azure Communication Services email sending with the azure.communication.email python package. The code that sends the email is in the Azure python function. The sending code is simple (no loops): client = EmailClient.from_connection_string(email_conn_string) message = { ... } poller = client.begin_send(message) result = poller.result() and according to the Azure Functions diagnostics, it gets called exactly once, and does not throw errors. The problem is that sometimes (up-to 30% of cases) the recipient gets the email twice as duplicate. According to the Communications Service logs, there are two SendEmail -operations within about 200ms: one to West Europe, and one to North Europe. The ACS configuration shows "Location: Global" and "Data Location: Europe". Any ideas on what causes this and how could I fix it? Continue reading...
