I host a personal full featured email service with a few domains available. Please write for more informations.
I also provide a webmail service for my domains:
I use, support and, when I can, contribute to, open and free projects and software solutions. This mail server is powered by Postfix/Dovecot and Rainloop, and everything is constantly kept up to date and configured to enforce security. You can find here the suggested connection parameters.
I host and instance of Nextcloud too. Here you can find the most cuttlefishy cloud in the whole net.
Mail is right but instant messaging is quite handy nowadays, so here it is an XMPP/Jabber service powered by Prosody.
You can find more informations here:
...there is not much anyway.