Hi all.
First of all, I’d like to introduce you Handshake.
In a nutshell, HNS is a blockchain for DNS.
That means you can have yourname as a TLD.
My goal is have a MIAB serving multiples HNS domains.
First block: I can’t use an HNS domain for installing it. I didn’t try to go around. I just ignored the problem by installing it under a regular domain. My hope is to be able to add extra users like user@handshake-domain.
Of course, MIAB didn’t allow me to add user@example, and complained it was an invalid email.
I just commented out part of the validation. From now one, I need to be careful when adding emails.
Without this validation I could move forward a bit. Now I can add users using HNS domain names.
I can even see DNS settings for the HNS domain names. 
So, I went to my HNS name server and add all those DNS entries.
Next, I tried to login on the webmail. It worked. +1
But I can’t send emails. It complains saying the recipient is not valid. -1
If I try to send from a HNS domain to a regular email it also fails. -2
SMTP Error (504): Failed to add recipient "mail@example.com" (5.5.2 <mail@example>: Sender address rejected: need fully-qualified address).
In this moment I decided to share my progress so far.
Comments? Suggestions?
Did you know about Handshake? (side subject)
So, is this a limitation on roundcube? Should I look for help over their github? Or is this a setting/config from MIAB?
