What to do if there is an error in the php mail server

What should I do if there is an error in the php mail server? PHP sending email fails on the server?

PHP sends emails, the code is correct, the local execution is OK, but when it is executed on the server, it fails?

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Cause

● SMTP server is written incorrectly

● The SMTP server port is occupied

Solution

● Go to the official website of the outgoing mailbox to see the configuration

● Do not use port 21, use port 465 instead , while using security protocols.

That is:

’SMTP_PORT’ => ‘465’ , $mail->SMTPSecure = ‘ssl’

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