diff --git a/docker-compose.yml b/docker-compose.yml
index a99c83f..745fcd0 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,7 +3,7 @@ services:
   db:
     image: mongo:4.4-bionic
     ports:
-      - "127.0.0.1:2${SEALIOUS_PORT:-0723}:27017"
+      - "127.0.0.1:${PORT:-2072}4:27017"
   test:
     image: sealious-test:latest
     build:
@@ -16,5 +16,5 @@ services:
   mailcatcher:
     image: schickling/mailcatcher:latest
     ports:
-      - "127.0.0.1:1080:1080"
-      - "127.0.0.1:1025:1025"
+      - "127.0.0.1:${PORT:-108}1:1080"
+      - "127.0.0.1:${PORT:-102}5:1025"
diff --git a/jenkins.prepare.sh b/jenkins.prepare.sh
index 839e120..6559635 100755
--- a/jenkins.prepare.sh
+++ b/jenkins.prepare.sh
@@ -7,7 +7,7 @@ docker-compose down
 cp secrets.example.json secrets.json
 
 
-export SEALIOUS_PORT=$PORT
+export SEALIOUS_PORT="${PORT}0"
 SEALIOUS_BASE_URL=$(cat .base_url)
 export SEALIOUS_BASE_URL
 
diff --git a/jenkins.start.sh b/jenkins.start.sh
index e19de74..a771456 100755
--- a/jenkins.start.sh
+++ b/jenkins.start.sh
@@ -1,16 +1,19 @@
 #!/bin/bash
 
-export SEALIOUS_PORT=$PORT
+SEALIOUS_PORT="${PORT}0"
 SEALIOUS_BASE_URL=$(cat .base_url)
 export SEALIOUS_BASE_URL
 
 ./npm.sh run build:front;
 
+docker-compose up -d mailcatcher
+
 docker-compose run --user="$UID"\
 			   -e "SEALIOUS_MONGO_PORT=27017" \
 			   -e "SEALIOUS_MONGO_HOST=db" \
 			   -e "SEALIOUS_PORT=$SEALIOUS_PORT" \
 			   -e "SEALIOUS_BASE_URL=$SEALIOUS_BASE_URL" \
+			   -e "SEALIOUS_MAILER=mailcatcher" \
 			   -p "${SEALIOUS_PORT}:${SEALIOUS_PORT}" \
 			   -d \
 			   test \
@@ -18,5 +21,6 @@ docker-compose run --user="$UID"\
 	&& echo "App started on $SEALIOUS_PORT"
 
 
-echo "Deployed to https://${PORT}.dep.sealco.de"
+echo "Deployed app to https://${SEALIOUS_PORT}.dep.sealco.de"
+echo "Mailcatcher available at https://${PORT}1.dep.sealco.de"
 echo "Application logs should be available at https://jenkins.sealcode.org/job/Deploy%20to%20dep.sealco.de/ws v2/$PORT/log.html"
diff --git a/jenkins.stop.sh b/jenkins.stop.sh
index 3078999..0438a0b 100755
--- a/jenkins.stop.sh
+++ b/jenkins.stop.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-export SEALIOUS_PORT=$PORT
+export SEALIOUS_PORT="${PORT}0"
 SEALIOUS_BASE_URL=$(cat .base_url)
 export SEALIOUS_BASE_URL
 
diff --git a/src/back/app.ts b/src/back/app.ts
index fb68ba8..9d914ae 100644
--- a/src/back/app.ts
+++ b/src/back/app.ts
@@ -1,6 +1,6 @@
 import _locreq from "locreq";
 import { resolve } from "path";
-import { App } from "sealious";
+import { App, LoggerMailer, SMTPMailer } from "sealious";
 import tasks from "./collections/tasks";
 const locreq = _locreq(__dirname);
 
@@ -31,6 +31,9 @@ export default class TheApp extends App {
 		"www-server": {
 			port: PORT,
 		},
+		core: {
+			environment: <const>"production", // to send the full html emails
+		},
 	};
 	manifest = {
 		name: "Sealious Playground",
@@ -47,4 +50,13 @@ export default class TheApp extends App {
 		...App.BaseCollections,
 		tasks,
 	};
+	mailer =
+		process.env.SEALIOUS_MAILER === "mailcatcher"
+			? new SMTPMailer({
+					host: "mailcatcher",
+					port: 1025,
+					user: "any",
+					password: "any",
+			  })
+			: new LoggerMailer();
 }