how to stop "Zenphoto Gallery registrering" emails being sent twice ? I either have to have notifications on or off in the register_user plugin.
Off I get nothing, on I get two emails exactly the same.

Enable only one email plugin.

As far as I can tell I only have the one enabled.

auto_backup
class-video
contact_form
deprecated-functions
flowplayer3
hitcounter
image_effects
register_user
security-logger
tiny_mce
user_login-out
zenphoto_seo

That is all that is being used, it is the register_user one that's causing the trouble.

If no email plugin is enabled (zenphoto_sendmail or phpmailer) Zenphoto should not even be able to sent mails.

I have the default instal plus the plugin's above.
If I tick "Notify" in the 'register_user' plugin I get 2 emails, if I untick it I get none.
Do I just have to live with getting 2 emails every time someone registers or untick "Notify" and get nothing ?
I am guessing there must be a fix somewhere as no one else seems to be receiving 2 emails on registration.

Sorry, I am not familiar with this plugin and I have to pass this to my collegue. Again, without one of the 2 mail plugins it should not even mail.

Sorry, but you must be reporting incorrectly. Without either PHPMailer or zenphoto_sendmail enabled you will get no email sent by Zenphoto. If both are enabled you will get duplicate mails.

Go back and look again.

I reset the settings as I wasn't using either PHPMailer or zenphoto_sendmail and tried with zenphoto_sendmail it didn't want to work, so I tried PHPMailer and that works as it should now, its quick to.
Thanks for the help, I'll stick with PHPMailer.
Cheers.