Solved Symfony\Component\Mime\Exception\RfcComplianceException:

[erdis]

google workspaces mail account.

• Symfony\Component\Mime\Exception\RfcComplianceException: Email to admin@admin.com failed setup: Email "0" does not comply with addr-spec of RFC 2822.
• src/vendor/symfony/mime/Address.php:56

#0 src/XF/Mail/Mail.php(130): Symfony\Component\Mime\Address->__construct('0', 'admin')
#1 src/XF/Service/Contact.php(231): XF\Mail\Mail->setFrom(0, 'admin')
#2 src/XF/Service/Contact.php(198): XF\Service\Contact->getMail()
#3...

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