Just terrible

Until it works apparently the service seems to be ok but...
I didn't use it for six months and they deleted all my mails without any warning. I found myself unable to retrieve all my online purchases and receipts from various online services, included all my licenses software and even more my steam account.
In repeated occasions they gone out of service leaving me in trouble trusting them. So i moved to another service more reliable leaving my mail with gmx just for licenses and purchases. i would have never expected that they was capable of doing worst then that
Customer service stopped to answer me when i started to do difficult questions to them. So they knows they are wrong :)
After all i advise to use gmx services just for temporary mails avoiding to manage important data because they could get lost very easily and even if asked politely many times arising the importance of the matter, customers service it will refuse to just resurrect your account. I am leaving them forever :)