I have had an integration problem when hosting my web application in production, and an unanswered support ticket with SendGrid that was created 5 days prior (at the time of writing this). 1&1 have assured me that all ports are open.
My SendGrid Email API (v3) is working perfectly well in development and when I deploy to a site on my network - I have been using an implementation similar to this: https://app.sendgrid.com/guide/integrate/langs/csharp.
When I deploy to my 1&1 Ionos webspace and test I receive the following error:
System.Net.Http.HttpRequestException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
---> System.Net.Sockets.SocketException (10060): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, CancellationToken cancellationToken) --- End of inner exception stack trace ---
I am starting to despair as this has caused something of a road block on a project of mine.
[EDIT]
I have just tried a httprequest using a different API and I get the same error. So it must be a server problem with 1&1, but what do I tell them?
