@dios98
Use this code:
Use SMTP for sending mail instead of mail()
smtp = On
SMTP server settings
smtp_server = smtp.sendgrid.net
smtp_port = 587
Enable SMTP authentication
Supported mechanisms: ssl, tls
smtp_auth = tls
smtp_username = apikey
smtp_password = pass
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 = On
; Default envelope sender to use if none is specified elsewhere
default_envelope_sender = youremail@domain.com
; 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 = On
; Force a DMARC compliant from header (RFC5322.From)
; If any of your users have email addresses in domains not under your control
; you may need to set this to be compliant with DMARC policies published by
; those 3rd party domains.
; Setting this will move the users address into the reply-to field and the
; from field wil be rewritten with the default_envelope_sender.
; To use this you must set force_default_enveloper_sender = On and
; default_envelope_sender must be set to a valid address in a domain you own.
force_dmarc_compliant_from = On
; The display name to use with a DMARC compliant from header
; By default the DMARC compliant from will have an empty name but this can
; be changed by adding a text here.
; You can use ‘%n’ to insert the users name from the original from header
; and ‘%s’ to insert the localized sitename.
dmarc_compliant_from_displayname = ‘%n’
; Amount of time required between attempts to send non-editorial emails
; in seconds. This can be used to help prevent email relaying via OJS.
time_between_emails = 3600
; Maximum number of recipients that can be included in a single email
; (either as To:, Cc:, or Bcc: addresses) for a non-privileged user
max_recipients = 10
; If enabled, email addresses must be validated before login is possible.
require_validation = Off
; Maximum number of days before an unvalidated account expires and is deleted
validation_timeout = 14