Opening 993 and 25 for Email Ports

[Bob.Dig]

and Axigen mail server in another LXC.

How good is it. Can you send email with anything before the @ without hassle (catch-all). How much RAM does the LXC consume. 

[Patrick M. Hausen]

Axigen is one of the nicest commercial offers I have used in my DC so far.
We were forced to cancel the subscription when they discontinued FreeBSD support 

Yes, arbitrary sender addresses as long as you authenticate with one proper account is a configurable option. Catch all for receiving also works.

[Bob.Dig]

Yes, arbitrary sender addresses as long as you authenticate with one proper account is a configurable option. Catch all for receiving also works.

Thanks Patrick. I hope this is also true for the free version. I haven't switched yet from something running on Windows. It should be light on resources and very easy to use, that's how I roll. 

[Patrick M. Hausen]

The free version is limited in the number of mailboxes. 5 IIRC which was just too few even for my private family network. 10 would have been sufficient.

But even their entry level commercial license is prohibitively priced for private use.