Hello all,

I would like to set up iRedMail so that the SMTP server only accepts mail from localhost for applications such as roundcube and from a tailscale IP address. That way, only devices on my tailscale network can send mail.

For postfix, I added the tailscale IP addresses of the mail server along with whatever device I want to give permission to send mail in the main.cf file. Example:

mynetworks = 127.0.0.1 [::1] 111.111.111.111 222.222.222.222

Tailscale IP for the mail server: 111.111.111.111
Tailscale IP for a different machine: 222.222.222.222

Directly above this, it is written:

# trusted SMTP clients which are allowed to relay mail through Postfix.
#
# Note: additional IP addresses/networks listed in mynetworks should be listed
#       in iRedAPD setting 'MYNETWORKS' (in `/opt/iredapd/settings.py`) too.
#       for example:
#
#       MYNETWORKS = ['xx.xx.xx.xx', 'xx.xx.xx.0/24', ...]
#

This variable does not exist in my setting.py file. Is it safe to create it?

Thanks for any help.