diff --git a/helper-scripts/nextcloud.sh b/helper-scripts/nextcloud.sh
index c12ecedeae..7c3e0a522d 100755
--- a/helper-scripts/nextcloud.sh
+++ b/helper-scripts/nextcloud.sh
@@ -178,6 +178,8 @@ elif [[ ${NC_INSTALL} == "y" ]]; then
     /web/nextcloud/occ --no-warnings config:system:set mail_domain --value=${MAILCOW_HOSTNAME}; \
     /web/nextcloud/occ --no-warnings config:system:set mail_smtphost --value=postfix; \
     /web/nextcloud/occ --no-warnings config:system:set mail_smtpport --value=588; \
+    /web/nextcloud/occ --no-warnings config:system:set mail_smtpstreamoptions ssl verify_peer --value=false --type=boolean
+    /web/nextcloud/occ --no-warnings config:system:set mail_smtpstreamoptions ssl verify_peer_name --value=false --type=boolean
     /web/nextcloud/occ --no-warnings db:convert-filecache-bigint -n"
 
     # Not installing by default, broke too often