Problem:
Only some email notifications are being sent

Details:
If you are getting email notifications of watched forums and emails for birthdays,
but NOT getting PM email notifications (when switched on) or
watched topic email notifications then it could be

Possible solution:

If you are running on Linux and using local SMTP
check the php.ini settings for mail

In my case they where set for windows: (ie wrong if using linux and local smtp)

[mail function]
; For Win32 only.
SMTP = localhost
smtp_port = 25


changed these to:

[mail function]
; For Win32 only.
; SMTP = localhost
; smtp_port = 25

You will need server administrator access or Ask your host provider to check.

Once I changed then all emails got sent out. grin