Notifications: failed send request [0] notify.mql5.com:443 failed
I have same problem, but I have no idea.....
IIRC, the maximum limit on emails, is just like SendNotification: “no more than 2 calls per second and not more than 10 calls per minute.” Add a Sleep(6) after the Send… and wrap a mutex around both (for multiple symbols).
Someone, somewhere, is banning something or is MQL5 having problems?