Hi, I used the acymailing however this is causing me big problems with K2 can anyone tell me a mailing list which works with K2 or a fix for the acymailing?

Thank you in advance

What problems?
Acymailing docs have several posts on k2 integration here
www.acyba.com/en/support/documentation.html

I just tried today this newsletter module:

mavrosxristoforos.com/joomla-extensions/free/newsletter-subscriber

You put in module your email adress (Gmail, Hotmail) and module send you emails of those signed to newsletter. Then you can do with those email addresses what you want.

Honestly i tried all those newsletters extensions and i am sick of them. How can i explain to beginners how to use Joomla and send mass mails with them, when even i cannot do it without problems.