diff --git a/.drone/drone-home.yml b/.drone/drone-home.yml
index c038b2c..fd4beb4 100644
--- a/.drone/drone-home.yml
+++ b/.drone/drone-home.yml
@@ -170,6 +170,7 @@ steps:
     - gitea_security_internal_token
     - gitea_oauth2_jwt_secret
     - gitea_mailer_passwd
+    - gitea_mailer_protocol
     script:
     - rm -f env-gitea
     - "echo \"export GITEA_MAILER_HOST='$${GITEA_MAILER_HOST}'\" >> env-gitea # \"gitea-mailer-host\""
@@ -181,6 +182,7 @@ steps:
     - "echo \"export GITEA_SECURITY_INTERNAL_TOKEN='$${GITEA_SECURITY_INTERNAL_TOKEN}'\" >> env-gitea # \"gitea-security-internal-token\""
     - "echo \"export GITEA_OAUTH2_JWT_SECRET='$${GITEA_OAUTH2_JWT_SECRET}'\" >> env-gitea # \"gitea-oauth2-jwt-secret\""
     - "echo \"export GITEA_MAILER_PASSWD='$${GITEA_MAILER_PASSWD}'\" >> env-gitea # \"gitea-mailer-passwd\""
+    - "echo \"export GITEA_MAILER_PROTOCOL='$${GITEA_MAILER_PROTOCOL}'\" >> env-gitea # \"gitea-mailer-protocol\""
   environment:
     GITEA_APP_NAME:
       from_secret: gitea-app-name
@@ -190,6 +192,8 @@ steps:
       from_secret: gitea-mailer-host
     GITEA_MAILER_PASSWD:
       from_secret: gitea-mailer-passwd
+    GITEA_MAILER_PROTOCOL:
+      from_secret: gitea-mailer-protocol
     GITEA_MAILER_USER:
       from_secret: gitea-mailer-user
     GITEA_OAUTH2_JWT_SECRET:
@@ -299,12 +303,14 @@ steps:
     - gitea_security_internal_token
     - gitea_oauth2_jwt_secret
     - gitea_mailer_passwd
+    - gitea_mailer_protocol
     script:
     - export GITEA_SERVER_LFS_JWT_SECRET=$${GITEA_SERVER_LFS_JWT_SECRET}
     - export GITEA_SECURITY_SECRET_KEY=$${GITEA_SECURITY_SECRET_KEY}
     - export GITEA_SECURITY_INTERNAL_TOKEN=$${GITEA_SECURITY_INTERNAL_TOKEN}
     - export GITEA_OAUTH2_JWT_SECRET=$${GITEA_OAUTH2_JWT_SECRET}
     - export GITEA_MAILER_PASSWD=$${GITEA_MAILER_PASSWD}
+    - export GITEA_MAILER_PROTOCOL=$${GITEA_MAILER_PROTOCOL}
     - export GITEA_MAILER_HOST=$${GITEA_MAILER_HOST}
     - export GITEA_MAILER_FROM=$${GITEA_MAILER_FROM}
     - export GITEA_MAILER_USER=$${GITEA_MAILER_USER}
@@ -330,6 +336,8 @@ steps:
       from_secret: gitea-mailer-host
     GITEA_MAILER_PASSWD:
       from_secret: gitea-mailer-passwd
+    GITEA_MAILER_PROTOCOL:
+      from_secret: gitea-mailer-protocol
     GITEA_MAILER_USER:
       from_secret: gitea-mailer-user
     GITEA_OAUTH2_JWT_SECRET: