SMTP and E41B0000

Questions
1

Describe the problem/error/question

Running into SMTP configuration errors

What is the error message (if any)?

“E41B0000:error:0A00010B:SSL routines:ssl3_get_record:wrong version number:openssl\ssl\record\ssl3_record.c:355:” issue

Please share your workflow

The only node (other than the trigger) there is the one to test SMTP Mail. I was trying Brevo SMTP relay server with the credentials provided there and running into the above issue. I am running n8n on my Windows 11 version (npx n8n to start and connecting to it on http://localhost:5678

(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.)

Share the output returned by the last node

Information on your n8n setup

  • ** 1.99.1 version:**
  • Database (default: SQLite):
  • n8n EXECUTIONS_PROCESS setting (default: own, main):
  • Own
  • Running n8n via (Docker, npm, n8n cloud, desktop app):
  • npm (via npx)
  • Operating system:
  • Windows 11
2

Hey @Juschequin ,

The error ssl3_get_record:wrong version number typically occurs when:

  • You’re using SSL/TLS on a port that expects plain text
  • The SMTP server requires STARTTLS instead of direct SSL
  • Port and security configuration mismatch

Double check if you are using STARTTLS or SSL/TLS , server and ports have to match