Getting 504 gateway timeout on sending email using phpmailer

[KangJL]

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Sending email from your website (PHP mail)

The most common way to send email from your website is by using the PHP mail() function. PHP mail() is an easy to use email system built into the PHP programming language. It’s the default setting for almost all applications. However, PHP mail is severely restricted on InfinityFree. To prevent spam and other abuse, most messages sent through PHP mail are rejected by the mail system. In practice, this means you cannot use PHP mail on InfinityFree to send your email. If you want to send email fr…