It's seems to be a problem in the new stunnel version 5.06
When I use the USERPROFILE directory, which contains special characters like "ö", i get an error:
[!] Cannot open log file: C:\Users\Bl�d\CSB\SSL\SmtpLog(0).txt

Is this a bug or must i change something ?

The configuration file " SmtpConfig(0).txt " :

; Configuration file
output = C:\Users\Blöd\CSB\SSL\SmtpLog(0).txt
taskbar = yes
cert = C:\Users\Blöd\CSB\SSL\stunnel.pem
client = yes
[ssmtp]
accept = 8801
connect = smtp.1und1.de:465

The log says:
[ ] No limit detected for the number of clients
[.] stunnel 5.06 on x86-pc-msvc-1500 platform
[.] Compiled/running with OpenSSL 1.0.1j-fips 15 Oct 2014
[.] Threading:WIN32 Sockets:SELECT,IPv6 SSL:ENGINE,OCSP,FIPS
[ ] errno: (*_errno())
[.] Reading configuration from file C:\Users\Blöd\CSB\SSL\SmtpConfig(0).txt
[.] FIPS mode disabled
[ ] Compression disabled
[ ] GUI message loop initialized
[ ] Snagged 64 random bytes from C:/.rnd
[ ] Wrote 0 new random bytes to C:/.rnd
[ ] PRNG seeded successfully
[ ] Initializing service [ssmtp]
[ ] Loading cert from file: C:\Users\Bl�d\CSB\SSL\stunnel.pem
[ ] Loading key from file: C:\Users\Bl�d\CSB\SSL\stunnel.pem
[ ] Private key check succeeded
[ ] SSL options: 0x03000004 (+0x03000000, -0x00000000)
[.] Configuration successful
[ ] Listening file descriptor created (FD=456)
[ ] Service [ssmtp] (FD=456) bound to 0.0.0.0:8801
[!] Cannot open log file: C:\Users\Bl�d\CSB\SSL\SmtpLog(0).txt
[ ] Closing service [ssmtp]
[ ] Service [ssmtp] closed (FD=456)
[ ] Service [ssmtp] closed

[!] Server is down

greetings
dirk