On Wed, 2016-03-30 12:00:16 +0200, Ivan De Masi wrote:
[..]
so, what would you recommend me?
Hi Ivan,
Check your virus scanner.
[..]
I *have* to configure my mail-client to use/listen on 127.0.0.1 to get in touch with stunnel. Or is there another way?
It's perfectly o.k. to have stunnel listening on 127.0.0.1:110 and the mail client connecting from 127.0.0.1 using an arbitrary port.
Again, each IP connection has two ends, each of which is characterized by IP address and port number. I your example, this is
(mail client) 127.0.0.1:1878 ---> 127.0.0.1:110 (stunnel)
This is how IP is designed to work.
So I don't understand, why it is not working anymore now and it conflicts now on localhost.
It does not conflict. Stunnel works as expected, but your virus scanner doesn't work. Maybe it stopped intercepting traffic on localhost (but that's a wild guess).
HTH,
Ludolf