EA does not send alert email every time

I got EA that sends me email alerts  and executes external exe/bat file via code when TP/SL is reached. So alerts are not triggered thru alerts created in Alerts tab because it has to be created manually.

Problem is that mail sending is not reliable on my VPS. I was told reason is VPS is slow/ 1 cpu only. And that mt4 terminals highest priority is order execution, while mails/ notifications are low priority, so the CPU does not executes those.

How to solve this?

Ideas?

Thanks 

Best regards