had to set the key <key>SOGoSieveServer</key> <string>sieve://SIEVESERVER:2000</string>
in .GNUstepDefaults -- users@sogo.nu https://inverse.ca/sogo/lists
had to set the key <key>SOGoSieveServer</key> <string>sieve://SIEVESERVER:2000</string>
in .GNUstepDefaults -- users@sogo.nu https://inverse.ca/sogo/lists