Error Mailer PHP. WP 4.9.4 PHP 7.2.2

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This is the error message when trying to send an email via php. Could you help me? Thanks in advanced.

Versions:
WordPress: 4.9.4
WordPress MS: No
PHP: 7.2.2
WP Mail SMTP: 1.2.5

Params:
Mailer: mail
Constants: No

Server:
PHP.mail(): Yes
Apache.mod_security: No