Port 25 vs port 587

Discuss installation of Scalix software
Posts: 77
Joined: Tue Mar 06, 2007 10:56 am
Location: Swindon, UK

Port 25 vs port 587

Postby pinnks » Sat Nov 02, 2019 7:06 pm

I have been running a pretty standard scalix set-up for ages as a small family mail server. The only thing I have really changed from an out-of-the-box installation is to relay my sent mail via my ISP as I am sitting behind a dynamic IP addy and some recipient servers bounced my mails. Even with this I am at the limits of my Linux and scalix knowledge...

All was well until I got a new modem/router hub from my ISP today. It will not allow port 25 (or 53 for DNS) to be forwarded. One option, which I am using as a work-around, is to set the hub to modem mode and then do your LAN/Wifi with a separate router. I have an ancient 2.4G router which is stumbling along to give that work-around and thought I would have to shell out for a more up-to-date bit of kit.

However, after much googling I am wondering whether I can make scalix listen on port 587, rather than 25 as port 587 is not blocked in the hub's port forwarding software. I have found a few threads talking about this but am confused. Can someone give me some pointers of what to change where?



Posts: 5500
Joined: Thu Mar 25, 2004 8:15 pm

Re: Port 25 vs port 587

Postby ScalixSupport » Mon May 18, 2020 1:39 pm

Hello Mr Garry,

You can follow the following tricks to change port.

Turning off port 25 and port 587 activation

configured SMTP for 587 also (465 will work too). But maybe need to double-check if it will work for ActiveSync in this way.

# cat /etc/stunnel/stunnel.conf
connect = localhost:587
accept =
connect = localhost:587
accept =
# cat /var/opt/scalix/mt/s/sys/smtpd.cfg
Scalix Support Team

Return to “Installation”

Who is online

Users browsing this forum: No registered users and 1 guest