Scheduled event won’t fire

The cron arg usage looks weird. The insert id will return garbage by the time your function is called.

By the same token, I believe better schedule it always, with the id argument, on insert, if this if for logging. Else you’ll be throttling your logs, basically.

Lastly, are you sure that wp_mail() is working?

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)