@agiorgini,
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Its seem look like your code error for setFrom('email,'areacode') Method of transport builder,
You can set areacode like, admin
You have just pass email id in setFrom() method, you have to pass second argument to setFrom method,
$transport->setTemplateVars(['data' => 'nonprende'])
->setFrom('ppp@test.it','admin')
->addTo('myemail@mydomain.it')
->getTransport();
$transport->sendMessage();
Change your code in controller with above code,
Please let me know if you have query.
If issue solved, click Kudos and Accept as Solution.
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