Error message by sending NOTIFICATION


I use OJS
I have a problem, when sending an article by the author, OJS gives an error that the email was not sent. I looked at the code, the NOTIFICATION email is not sent from file \lib\pkp\classes\notification\ But the author receives a confirmation email.
This is the fourth day I’ve been looking for what’s wrong


My config settings


; Use SMTP for sending mail instead of mail()
smtp = On

; SMTP server settings
smtp_server =
smtp_port = 465

; Enable SMTP authentication
; Supported mechanisms: ssl, tls
smtp_auth = ssl
smtp_username =
smtp_password = **********

; Enable suppressing verification of SMTP certificate in PHPMailer
; Note: this is not recommended per PHPMailer documentation
; smtp_suppress_cert_check = On

; Allow envelope sender to be specified
; (may not be possible with some server configurations)
allow_envelope_sender = Off

; Default envelope sender to use if none is specified elsewhere
; default_envelope_sender =

; Force the default envelope sender (if present)
; This is useful if setting up a site-wide no-reply address
; The reply-to field will be set with the reply-to or from address.
force_default_envelope_sender = Off