test post...
test 2
test 3
test 4
right... those tests told me the following...
Okay... the email command on unix has started to not work again!
I tried setting it to use the SMTP settings you sent me Dave, but they didn't work either!
my test
No idea what it is but same as before - it's resolved itself!
flash...
Well the site totally vanished for a while last night (around midnight) I wonder if they were rebooting it.
Nitrogen, one of my other servers was rebooted yesterday so it's possible Cherry was too - I haven't been notified but it's possible. Mail server might have had a problem prior to reboot hence bounces.
Any way, all's tickety-boo now.
damn it... its happening again!
Not jusy me then.........
ERRR DEBUG etc
Turn your email notification off and it will go away! 
It's always been off 
The emails are not being routed through SMTP Yith.
Debugging PHP is beyond me I'm afraid
no they're going through the unix mail command... thats what's failing.
Its what failed before and then got better again.
Exactly the same problem as we had previously
So switching the email to 'Use SMTP Server for email' won't work?
Meh, let it sort itself out!
probably best... but thought I better mention it.
It seems to have fixed itself.
No, I sorted it.
how?