I have mounted a clean installation of hestia + wordpress in hestia the serious problem I have that I can not configure mail with WP Mail SMTP by WPForms – Plugin WordPress | WordPress.org España
it does not send the mail even though I have it well configured someone else has tried it
I would suggest to reach out the support of the wordpress module - personaly i dont think this is related to hestia itself.
This configuration is normal, I have tried it in cpanel or others and it works curiously in hestia it does not want to work.
Not work is a way to far definition, impossible to help. Please provide a minimal debug work with errors, logs or other output.
Yes! Please always try to be ultra-specific.
I’d suggest you check exim log at /var/log/exim4/mainlog and see if you have any relevant records.
It sounds like it is a plugin to setup a smarthost within wordpress - so I think the mails will not be sent over exim. Anyway, without any additional informations, it’s wasted time 
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I had the same issue some months ago when migrating to hestia.
I changed the plugin.