Members not getting email notification when they get a pm

[CouponWCents]

I don't see anything about cron based email under email options.

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I don't see an email queue.

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These are the options under email options:

Enable Email features?
Allow Users to Email Other Members
Use Secure Email Sending
Email Flood Check
Use Mailqueue System
Number of Emails to Send Per Batch
Bounce Email Address
Enable '-f' Parameter
Use Bulk Header?
Encode as UTF-8
SMTP email
SMTP Host
SMTP Port
SMTP USername
SMTP Password
SMTP Secure Connection