Thanks for your comment.
For the search engine it seems to make no difference were the post is located.
Now it is posted twice. Maybe it helps.

I've installed Opera Mini (7.1 and 8.0) and Opera Mobile on my Nokia 5800 with Symbian S60 (60.0.003.001.01) When accessing my Mail Provider via Opera Mini HTML-Browser mm.web.de or clubcenter.web.de i get the following error message since a few days: "It is not possible to complete this secure transaction" (in german: " Es ist nicht möglich die sichere Transaktion abzuschliessen"), "Secure connection fatal error (50)" Before this I was able to login to my mailaccount and access my mails. Hopefully this is not the end of my good old Nokia 5800 Xpress Music. Answer from web.de Support: Because of safety reasons you should buy a new device With Opera Mobile I'm still able to access web.de, but in many cases it is too slow and is running out of internal phone memory? Any support and any help very welcome

I've installed Opera Mini (7.1 and 8.0) and Opera Mobile on my Nokia 5800 with Symbian S60 (60.0.003.001.01)
When accessing my Mail Provider via Opera Mini HTML-Browser mm.web.de or clubcenter.web.de i get the following error message since a few days: "It is not possible to complete this secure transaction" (in german: " Es ist nicht möglich die sichere Transaktion abzuschliessen"), "Secure connection fatal error (50)"
Before this I was able to login to my mailaccount and access my mails.
Hopefully this is not the end of my good old Nokia 5800 Xpress Music.
And I do not have to share the frustration of Google, Microsoft and Apple so called highend Users
Answer from web.de Support: Because of safety reasons you should buy a new device
With Opera Mobile I'm still able to access web.de, but in many cases it is too slow and is running out of internal phone memory? Any support and any help very welcome