Hey,
Why is UBB banned from MANY web hosts? Soem of which are at the top [Biggest and most successful/reliable].

Is it sort of unsecure or soenthing?

[Ex of host your banned form: hosting24.com]

Well, likely they've banned UBB.Classic due to high resource usage; it wasn't optimized for large forums and was perl/flat file based.

Gizmo pretty much nailed it. I've had a couple customers be in this situation where their host said UBB was banned. Once they contacted them and explained that UBB.threads is MySQL based and totally different from UBB.classic there was no problem installing on the host.

So is the current release stable enough for a large number of users and alot of content?

Yes, this thread covers the question a bit.

i've consulted on a forum with over 350,000 users in it.. the only bottleneck there was that the welcome PM on signup got repeated 350,000 times!!

i modded that forum, so it used a shared welcome PM and things were ok

Mail traffic is another concern in shared hosting. But its always better to go with VPS. now a days vps are getting cheaper.

My approach has always been not to ask for permission, but be prepared to beg for forgiveness if you board takes off. If UBB.threads is causing a resource issue on your server, then you have a "High Class" problem since you will require several thousands of users before it will attract the attention of the host.

For the mail issues, especially delivery problems, I use Google Apps and gmail's SMTP servers. Each Google Apps account has a limit of 500 outbound emails per day, but I use a cron script to rotate accounts every 10 minutes. You can have up to 50 accounts on their free plan, meaning 25k outbound messages a day. If you set your SPF correctly to include the google servers and your host server then you will rarely have a problem with delivery.

One of the problems with VPS is security and the admin overhead/learning curve. I have used VPSLink for many projects, but their IPs are constantly targeted as the hackers know that these virtual boxes are mainly managed by inexperienced newbies. If you do go down the VPS path then always check the IP addresses you are allocated against the blacklists. If yours shows up then request another or you will definitely experience problems getting your mail delivered.