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I keep getting "PHP Question2Answer email send error: Could not instantiate mail function." error on the error_log file. In 1 or 2 day the file becomes 2 gb with these error logs. My Q2A site doesn't requires any email sending. I am not using mail verification system. How can I solve this error?

This is only one seconds errors:

[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.
[23-Sep-2019 15:28:01 Europe/Minsk] PHP Question2Answer email send error: Could not instantiate mail function.

Q2A version: 1.8.3

1 Answer

0 votes
by
As I know, there is no way to turn off email notifications and you receive these error because the notification emails also (not only from user verification).

To solve this, try to use a SMTP server or local php mail function.
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