I was checking my logs for my web app and I have not seen this before, but in the last week I am seeing the following about every 30 seconds:

Information 01:46:44.700 [WN0XSDWK0000F3]-[] System.Net.Http.HttpClient.sendgrid.LogicalHandler - Start processing HTTP request POST https://api.sendgrid.com/v3/mail/send
Information 01:46:44.700 [WN0XSDWK0000F3]-[] System.Net.Http.HttpClient.sendgrid.ClientHandler - Sending HTTP request POST https://api.sendgrid.com/v3/mail/send
Information 01:46:44.717 [WN0XSDWK0000F3]-[] System.Net.Http.HttpClient.sendgrid.ClientHandler - Received HTTP response headers after 15.8722ms - 200
Information 01:46:44.717 [WN0XSDWK0000F3]-[] System.Net.Http.HttpClient.sendgrid.LogicalHandler - End processing HTTP request after 16.262ms - 200

I use SendGrid to send emails. But my volume is about 10 emails/hour, not 2/minute. And if it was sending emails, there would be a log message for that action.

What is going on here? Does the SendGrid client check in every 30 seconds?

I don’t think it’s relevant but I have a Blazor Interactive Server app running on Azure App Service