By "by ok to use" I mean:


are MTA agents receiving emails from my server going to reject my
email
if not, are they going to make other kind of bad treatment for my
emails (marking as spam, unsafe and so...)?


...or is it just better idea to stick with non-encrypted emails?


Question: Tomcat uses BASIC auth instead of FORM auth
Answer: It seems that reloading the webapp was not enough in my case.

After restarting tomcat by FORM Authentication is being used.

ADD: FORM authentication is using a different digest algorithm than BASIC/DIGEST. Hence my old user auth database is not reusable. But this is a different topic. :)