Mass Mail not working!

Registration email is correct. I updated from CB 1.9.1 - It worked fine before update.
From another page with only 20 users it works fine - but her with 98 users nothing happens! Theese two sites are on the same server.

rbuelund wrote: Registration email is correct. I updated from CB 1.9.1 - It worked fine before update.
From another page with only 20 users it works fine - but her with 98 users nothing happens! Theese two sites are on the same server.

If you turn on Joomla debugging to maximum level do you see any messages when trying to mass mail?

So sending a mass mail to 20 users works, but 98 doesn't? Sounds like you're hitting your servers mailer limits. You can't just blast as many emails as you want. Most hosts will limit you to X per minute, hour, etc.. Try using the built in queue feature for mass mailer to send them in batches of 10-20.

As I wrote no problem with CB 1.9.1. I was sending two batches with 50 - worked fine. This does not work after update. I have tried both 2x50 (30 sec break) and 1x100 - nothing.

Actually this was two different sites but on the same server. On one site I can send mails after update, on the other site I cannot send mails at all! Not 98 nor 6 mails - so the system is not working. The Joomla mailsystem works fine.

So which install let you send 20 emails? The one with working registration emails or the one that won't send the 98 emails? Sorry, confused with your testing case. If it's that specific install then there could be a installed CB plugin causing a conflict; try disabling all non-core CB plugins and see if it'll work.