Recently the main Newsletter list page is very slow to load.
On my server I get to it here:
Upgraded to the latest WordPress, no change, still slow to load.
I don't mind so much the slow page load, but the last newsletter failed to send at 31%.
Upgraded to latest plugin, same. But last newsletter finished sending.
Any ideas why this might be happening? Any logging I can switch on to see why this page is slow and why the newsletter failed?
I have a feeling it is something the web hosting company has changed, but I need concrete info to go back to them and ask them to revert their changes.