Configuring POP3 with Sendgrid - Can't receive emails but can send them-CodePudding

All I have is an email client (

As you can see, SMTP authenticates just fine and this makes sense as I am seemingly able to send email. However, both IMAP and POP3 when I select them in the "incoming server" are stuck on this "testing" stage until they fail.

Now, if we skip ahead to me sending something out - basically, it works. I receive the email on the destination, it does not get marked as spam and it comes from my domain and my name.

However, when I attempt to receive an email on the [email protected] one, it just doesn't do anything. I don't get an error from gmail that it wasn't delivered, it simply just doesn't get delivered.

For my domain settings, I have the following configured:

CodePudding user response：

Twilio SendGrid developer evangelist here.

While SendGrid allows you to send emails over SMTP or via the API, SendGrid is not a full mailbox that you can connect to over POP3 or IMAP. You cannot connect to SendGrid using an email client, that is not what it is intended for. SendGrid is not a mailbox, but a way to programmatically send and receive emails and other email based events.

The way to receive incoming emails is via the inbound parse webhook. When you have set that up, incoming emails to your configured domain will cause a webhook, an HTTP request, to be sent to a URL you configured, with all the information about the email.