Hi there,
I’m having trouble setting up SMTP credentials using port 587 (using user/password and STARTTLS). N8N’s test is returning: Invalid login: 504 5.7.4 Unrecognized authentication type.
This seems to work though:
- podman exec -it n8n-app sh
- openssl s_client -starttls smtp -connect :587
- EHLO test
- AUTH LOGIN
- User/Password
Describe the problem/error/question
Setup of SMTP credentials using port 587 with user and password with STARTTLS.
What is the error message (if any)?
Invalid login: 504 5.7.4 Unrecognized authentication type
Please share your workflow
Share the output returned by the last node
Information on your n8n setup
- n8n version: 1.118.2
- Database (default: SQLite): postgresql
- n8n EXECUTIONS_PROCESS setting (default: own, main): -
- Running n8n via (Docker, npm, n8n cloud, desktop app): podman
- Operating system: Debian 13