Usually, these emails are working: sture.hultqvist@gammadata.se, info@sidescan.eu, info@sonar.se
Sometimes that mail server is having trouble. Other times, Sture is overwhelmed with e-mail. For those reasons, an alternative way to contact Sture is by post:
Sture Hultqvist
Flogstavägen 20
S-752 73 Uppsala
Sweden