When my users sign up I get a confirmation email (via sendgrid), they get a confirmation email, and their user info gets added to my database. All 3 actions/services typically execute successfully, but sometimes I will see new users in the database without getting a confirmation email for that user.
Is this a potential issue with speed of execution, or a load issue? What are the reasons this could be happening?
btw, I have also had this happened while placing a request in our system. We see the request appear in the database, but we do not receive an email notification.
Hello!
Probably Sendgrid service has limit for time execution and load issue.
Our guess is that several instances of your app making request to sendgrid smpt server at the same time, thus some of services responses with error status.
You can make stress test manually from test tab of your service in Appery.io builder or try to ask a questions about time limitation and number of requests from one api_key in one second/half second.
Thank you for your quick response, I will stress test it.