We are using a web form to create new Case records. The configuration of the web form specifies that e-mail notification should go to a certain address (we'll say "support@ourcompany.com").
The form is submitted, the client's browser redirects to the specified thank-you URL, and a new Case record is created in the database. But we do not receive the expected notification message at support@ourcompany.com; instead, about 40 minutes later we receive this:
"Email Send Failure Alert | The following email failed to send. Method has tried to send this email via your specified mail server a total of 5 times, approximately 5 minutes apart, before giving up. | Response from Mail Server: The operation has timed out."
Now the bizarre thing: the failure message is received within seconds of the time it was sent (as most e-mail is). The original notification repeatedly times out, but the failure notice works. Both messages are using the default e-mail address configured in Method, both are sent with the same From address (support@ourcompany.com) and the same To address (support@ourcompany.com). Why does the original notification fail, but the failure notice doesn't?