Make Rocketchat use certificate for secured SMTP server

Community Support
1

Hi,

for one of my company’s customer we’re integrating Rocketchat in their architecture. They want to use their own SMTP server for email notifications, which:

  • Requires authentication (user and password)
  • Listen on port 25 even if it is a SMTPS mail server
  • requires a certificate for connecting

We are struggling with the third point. Is there a way in Rocketchat to make it use a certificate for connecting to that SMTP server?
If so, is it possible and how to inject that in a dockerized Rocketchat installation?

Thanks in advance.

Gianluca

Server Setup Information

  • Version of Rocket.Chat Server: 3.15.0
  • Operating System: Centos 7.9
  • Deployment Method: Docker
  • Number of Running Instances: 1
  • MongoDB Version: 4.0
2

Hi!

I was checking the source code for your question, and searching for MAIL_URL I found this:

I think the best you can get right now is a mix and match of the following options:

rocketchat:
  ...
  environment:
    - MAIL_URL=smtps://user:password@smtp_server:25&secure=false&ignoreTLS=true

One could work around this requirement by setting up an smtp relay that will use the provided certificate and provide a smtp server that will work with Rocket.Chat.

1 Like
3

Hi! Thanks for your exhaustive reply.

Yes I I’ve thought about the smtp relay (postfix) on which I could use the certificate, but the customer asked if there was a native way to connect to their SMTP without the relay.

Since you confirmed me that the STMP relay is the only way, I will tell them this is the only workaround.

Thanks again