diff --git a/data/Dockerfiles/dovecot/docker-entrypoint.sh b/data/Dockerfiles/dovecot/docker-entrypoint.sh
index 801d422a..aa1aa0ae 100755
--- a/data/Dockerfiles/dovecot/docker-entrypoint.sh
+++ b/data/Dockerfiles/dovecot/docker-entrypoint.sh
@@ -310,6 +310,7 @@ EOF
 # Get SOGo IPv6 from Dig
 SOGO_V6=$(dig +answer sogo AAAA +short)
 
+if [ $SOGO_V6 ]; then
 cat <<EOF > /etc/dovecot/sogo_trusted_ip.conf
 # Autogenerated by mailcow
 remote ${IPV4_NETWORK}.248 {
@@ -321,6 +322,15 @@ remote ${SOGO_V6} {
 }
 EOF
 
+else
+cat <<EOF > /etc/dovecot/sogo_trusted_ip.conf
+# Autogenerated by mailcow
+remote ${IPV4_NETWORK}.248 {
+  disable_plaintext_auth = no
+}
+EOF
+fi
+
 # Create random master Password for SOGo SSO
 RAND_PASS=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 32 | head -n 1)
 echo -n ${RAND_PASS} > /etc/phpfpm/sogo-sso.pass