Problem sending email from a cloud server
I am not sure that it will help but you can look at the following thread: emails when my account takes a trade
and you can look at this post for example -
Forum on trading, automated trading systems and testing trading strategies
Experts: Mail All Order Status Periodically
Alain Verleyen, 2016.11.18 09:27
Of course you are wrong. That's funny to see how people are saying me I am dreaming or I don't know what I am talking about when they are wrong 
1° You have to configure gmail/gmx to allow external application.
2° Configure your MT4
And by the way it was ALWAYS working (except maybe on some build for a short time). 
I don't have a problem sending email from my laptop in metatrader in my EA but
the cloud while configured the same way will not send mail alerts trigger by sendmail.
Anyone encounter this and have a workaround?
kind regards.. Neal Russell Vanderstelt