It could be the email address of the sender from ubb was blacklisted. Then somebody requested it to be unlisted. Then it got blocked again.
Or you just have issues with the host smtp.
Either way somebody needs to contact the hosting company and inquire .
BTW,
The emails are sent from whatever you have in:
Control Panel » Primary Settings
Board Email Address:
All emails being sent out will come from this address.
also expand the advanced settings to look at smtp servers etc.
Last edited by Ruben; 12/30/2015 3:36 PM.
