I an having the very same issue on my forum. I'm not sure what's wrong as I was able to send out test messages a few days ago.
Your board's URL:
http://www.vanilla-chai.nu/dsg
Version of phpBB3: 3.0.4
Was this a fresh install or a(n) update/upgrade/conversion (please be specific)?: The original board was installed, fresh, as v3.0.3; a couple days ago however, I ran the automatic update (due to another problem I was having) to v3.0.4. It's currently still at 3.0.4
If update, what package(s) did you use?: ----
Did you use an automated wizard provided by your host to install phpBB?: No
MODs you have installed: None
When the problem started: This is the first time I've encountered the problem.
Your level of expertise (be honest): With HTML code- expert. With PHP/databasing... beginner.
Additionally, you may wish to provide the following (where applicable)
Template(s) used:
Darkness
Language(s) used: English
Version of PHP used: 5.2.6
Database and version used: I'm assuming this is the MySQL database version? If so, it's 5.0.51a
If at all possible, I'd like to fix this
without having to completely re-install the boards. I already have accounts set up, and the design is just how I want it. If I can at all avoice having to re-do 3 weeks worth of work.. I'd much appreciate it- however, any help is appreciated. Thanks.
EDIT: Just thought I'd mention that it doesn't matter how I add users- whether I click on a direct PM link or if I add them with the member search.. even just typing in their name and hitting 'Add [To]'- none of these works.