cant get confirmation/order emails to work - will pay money for someone to fix this

cant get confirmation/order emails to work - will pay money for someone to fix this

my order/confirmation emails have stopped working - neither i nor the customer who purchases a product gets an email notification.

i tried what support suggested even though their advice is not very clear. someone please help!

Problem in joomla configuration (email).
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See configuration / general
admin email:

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