Packaging a mail server: can an app ever bind 25/465/993, and what is the permitted tcpPorts range?

[LoudLemur]

Could Cloudron allow apps to request privileged tcpPorts (<1024), or document the restriction?

This is absent from the manifest docs. Does an exception mechanism exist?

Is displacing the built-in mail stack ever supported?

These enquiries relate to the recent thread discussing SnappyMail not receiving many updates anymore, and looking around for alternative mail servers to package for Cloudron, e.g. Stalwart:

https://stalw.art/mail-server/

[robi]

SnappyMail is not a mail server.

So to replace it, you only need an alternative front end mail app that will use the built-in Cloudron (Haraka) mailserver.

[james]

Hello @loudlemur

can an app ever bind 25/465/993

Default, no.
Possible, but will break with every Cloudron udpate.

[timconsidine]

@loudlemur your AI will explain it to better than this forum can.
I had thoughts about making an app for AI which handled its own mail, but ruled it out and had to devise a workaround.

[girish]

Running an alternate mail server on Cloudron is unlikely. Automated provisioning of email setup of apps is part of the product (from v1 of Cloudron) and this would break if we supported other mail servers.