We're struggling with large mailings with a large number of recipients. This is the same project that I brought up a few months ago. The site is only able to send about 1200 emails at a time before it times out. Clicking on Retry will complete approximately another 1200. The total number to send is 24,286.
I was going to ask more questions, but I just noticed one thing that I missed previously, so I have just one question.
The mailing was set up using the Dynamicweb Send Provider, which is using a SendGrid account (rather than the Marketing SendGrid provider). Am I correct that that doesn't perform well for large mailings, and that we should be using the Marketing's SendGrid provider instead? Could that be the issue with it timing out each time it tries to send the emails?
We continue to struggle with large mailings so I would like to find a stable option. If it's my mistake above, at least it would be good to know that it's the problem and we should expect it to work next time using the SendGrid provider.
Note that this is 9.13.3, but the same timeout issues happened on 9.10 too, for the same site.
As a side, I tried the new throttle settings (https://doc.dynamicweb.com/forum/feature-requests/feature-requests/add-throttle-to-email-mailing), but that didn't help or hurt with the timeout issue. It still times out after a given amount of time.